scholarly journals Regarding the Question of Postoperative Asthenopia

2021 ◽  
Vol 18 (4) ◽  
pp. 833-839
Author(s):  
N. V. Maychuk ◽  
I. A. Mushkova ◽  
L. T. Shamsetdinova ◽  
M. R. Obraztsova
Keyword(s):  
Visual Acuity ◽  
Professional Activity ◽  
Visual Fatigue ◽  
Functional Parameters ◽  
Optical Correction ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
Close Range ◽  
Subjective Discomfort

Relevance. It is well known that asthenopic complaints, such as increased visual fatigue when working at close range, lacrimation, eye pain and headache after corneal refractive operations in recent years are increasingly common at routine ophthalmological practice. They cause significant subjective discomfort in patients and reduce the satisfaction of the surgery. The pathogenesis of asthenopia is a violation of the coordinated work of the accommodation and binocular systems as a result of their overstrain with excessive visual loads.Purpose. To study the role of the lack of adequate optical correction before surgery in the development of asthenopia in patients with mild and moderate myopia after ReLEx SMILE surgery, as well as to evaluate the effectiveness of drug correction of this condition.Patients and methods. This study included 84 patients (128 eyes) who spend more than 8 hours at a computer due to their professional activity, without pathology of the visual organ that prevents keratorefractive operations, whose average age was 33.2 ± 1.9 years.Results and discussion. The ReLEx SMILE operations in all patients were carried out without complications with the achievement of uncorrected visual acuity equal to the preoperative values of the maximum corrected visual acuity in the period of 1 week and 1 month. In the group with a preoperative lack of adequate optical correction, signs of asthenopia were more often manifested than in patients using full eyeglass or contact correction before surgery. The appointment of the drug Mydrimax® allows to improve the subjective state of patients with asthenopia and leads to the normalization of functional parameters.Conclusion. Corneal refractive operations in patients with the lack of adequate correction of refractive disorders before surgery leads to a significantly significant increase in the initially impaired functional parameters compared to preoperative values, however, it does not reach normal values in most cases and is accompanied by a greater probability of developing postoperative asthenopia.

Why does an ophthalmologist wear glasses?

2021 ◽  
pp. 121-123
Author(s):  
L.S. Voskanyan ◽  
◽  
I.V. Zverova ◽  
M.E. Mirgorodskaya ◽  
◽  
...  
Keyword(s):  
Visual Acuity ◽  
Online Survey ◽  
Surgical Interventions ◽  
Work Related ◽  
Corrected Visual Acuity ◽  
Quality Of Vision ◽  
Uncorrected Visual Acuity ◽  
Subsequent Choice ◽  
Personal Use ◽  
Visual Organ

The aim of the study was to identify the reasons for the personal use of vision correction tools by ophthalmologists and the importance of vision for the specialty. Materials and methods. An anonymous online survey was conducted, which was attended by 122 respondents, including 111 ophthalmologists. Results. The visual acuity of two eyes without correction among the respondents was 1.0 and higher in 51 people. The maximum corrected visual acuity with two eyes was: 1.0 and higher in 79 respondents; less than 1.0 to 0.7 inclusive in 12 (those who refrained from answering the question had uncorrected visual acuity of 1.0 and higher). More than half of the respondents (56) suffer from myopia. Among the respondents, 53 use point correction. Of the spectacle lenses, ophthalmologists prefer plastic ones more. 36 respondents use contact correction. Surgical interventions on the organ of vision were performed in 12 patients. All respondents noted that they do not have cataracts, glaucoma, diseases of the optic nerve and color perception disorders. The choice of specialty did not depend on the existing diseases of the visual organ in 101 doctors, 9 people noted the connection between the previous pathologies of the visual organ with the subsequent choice of profession. Conclusions. According to the results of the study, it is possible to note the high maximum corrected visual acuity of ophthalmologists. Despite this, some respondents experience inconveniences at work related to visual impairments. For themselves, ophthalmologists often choose eyeglass correction instead of contact. And of the spectacle lenses, they prefer plastic ones more. The reasons for the use of glasses or contact correction among doctors of this specialty are increased requirements for the quality of vision. Key words: ophthalmologist, myopia, vision, glasses.

Μελέτη της ασφάλειας και αποτελεσματικότητας του ενδοκερατοειδικού διαθλαστικού ενθέματος Flexivue TM Micro-Lens (Presbia, CA Cooperatief U. A, Netherlands) για τη διόρθωση της πρεσβυωπίας

2014 ◽  
Author(s):  
Αλίκη Λιμνοπούλου
Keyword(s):  
Visual Acuity ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
Micro Lens

Η πρεσβυωπία (φυσιολογική γήρανση του μηχανισμού της προσαρμογής) αποτελεί ένα κοινό πρόβλημα για τα άτομα ηλικίας άνω των 40 με 45 ετών. Αρκετές πιθανές θεωρίες έχουν προταθεί σχετικά με την παθολογική φυσιολογία για την ανάπτυξη της πρεσβυωπίας. Η πιο αποδεκτή είναι η σχετιζόμενη με την ηλικία μείωση της ικανότητας του κρυσταλλοειδούς φακού να προσαρμόσει, η οποία επιδεινώνεται προοδευτικά με την αύξηση της ηλικίας 1. Το γεγονός αυτό θα μπορούσε να προκληθεί είτε από την ηλικιακή σκλήρυνση του κρυσταλλοειδούς φακού, είτε από μεταβολές στον περιφακικό σάκο και το ακτινωτό σώμα σχετιζόμενες με ηλικιακές εκφυλίσεις των ιστών. Ανεξάρτητα τον μηχανισμό, η πρεσβυωπία μειώνει την κοντινή όραση. Όταν δε διορθωθεί μπορεί να επηρεάσει την ικανότητα του ατόμου για διάβασμα, τη συμμετοχή του σε διάφορες δραστηριότητες και τελικά την παραγωγικότητα του στην καθημερινή του ζωή 2.Είναι σημαντικό να τονισθεί η σημασία του φαινόμενου της πρεσβυωπίας και το πόσο αυτή επιδρά στην καθημερινή μας ζωή. Σε μελέτες που έγιναν στην Αμερική βρέθηκε ότι το 1998, περίπου 113 εκατομμύρια Αμερικανοί πολίτες ήταν σε ηλικία άνω των 45 ετών, ηλικία που αρχίζει να εμφανίζεται η πρεσβυωπία. Η θεραπεία της πρεσβυωπίας, παρόλο που είναι αποτελεσματική με την χρήση των θετικών διορθωτικών φακών για κοντινή όραση, έχει προκαλέσει το ενδιαφέρον των ερευνητών που έχουν προτείνει μια σειρά από χειρουργικές θεραπευτικές παρεμβάσεις. Η τοποθέτηση σκληρικών ενθεμάτων επέκτασης συνιστά μία χειρουργική τεχνική επιδίωξης αναστροφής της πρεσβυωπίας μέσω αύξησης της απόστασης της ακτινωτής απόφυσης από το σκληρό χιτώνα, με επακόλουθο την ανάκτηση μέρους της ελαστικότητας των ινών της ζιννείου ζώνης 3. Εναλλακτικά, αξιοποιείται η τεχνική της ‘μονο-όρασης’ (monovision), κατά την οποία ο κυρίαρχος οφθαλμός διορθώνεται με laser ή με τοποθέτηση μονοεστιακού ενδοφακού για την εξυπηρέτηση της μακρινής όρασης, ενώ ο έτερος για εκείνη της κοντινής. Ωστόσο, ο ασθενής συχνά αντιμετωπίζει σημαντικά προβλήματα στη διόφθαλμη όραση (όπως η μείωση του βάθους πεδίου και η απώλεια στερέοψης) 4-7. Ένας άλλος τρόπος διόρθωσης αυτού του περιοριστικού παράγοντα είναι με τη χρήση προσαρμοστικών ενδοφακών οι οποίοι ακολουθούν τις κινήσεις της προσαρμογής που υπόκειται ο σάκος του περιφακίου (στον οποίο είναι τοποθετημένοι) από το ακτινωτό σώμα. Αυτοί οι φακοί μπορούν να παρέχουν 0,5-1 διοπτρίες ‘ψευδο-προσαρμογής’8. Συγκριτικές μελέτες απέδειξαν ότι οι προσαρμοστικοί ενδοφακοί παρέχουν την ίδια, άνευ διόρθωσης, μακρινή οπτική οξύτητα, όμως χάνεται η δυνατότητα για κοντινή όραση μετά τους πρώτους έξι μήνες, εξαιτίας μείωσης της ελαστικότητας του περιφακίου (ανάπτυξη μετεγχειρητικών συμφύσεων) 9.Η χρήση πολυεστιακών ενδοφακών τελευταία έχει γνωρίσει ιδιαίτερη αποδοχή τόσο από τους ασθενείς όσο και από τους οφθαλμιάτρους. Ωστόσο και με αυτή τη μέθοδο παρατηρήθηκε μία σχετική μείωση των ποιοτικών χαρακτηριστικών της μακρινής και κοντινής οπτικής οξύτητας με (best spectacles corrected visual acuity-BSCVA)/χωρίς (uncorrected visual acuity-UCVA) διόρθωση καθώς και της ευαισθησίας στην φωτεινή αντίθεση 10, 11.Οι χειρουργικές τεχνικές με τη χρήση laser στο επίπεδο του κερατοειδούς είναι μη αναστρέψιμες, καθώς μεταβάλλουν τη δομή του ιστού μέσω φωτοδιάσπασης, ενώ ο ασθενής ενδεχομένως να υποστεί μελλοντικά επιπλέον επέμβαση στους οφθαλμούς του για την αποκατάσταση του καταρράκτη. Οι χειρουργικές τεχνικές που αφορούν το σκληρό και τον κρυσταλλοειδή φακό, είναι πιο επεμβατικές και ακρωτηριαστικές για τους νέους πρεσβύωπες μέχρι 50 ετών στους οποίους ο φακός διατηρεί κάποιες εφεδρείες προσαρμογής. Έτσι, η επιστημονική κοινότητα αναζητά μία ελάχιστα επεμβατική και δυνητικά αναστρέψιμη χειρουργική τεχνική για τη διόρθωση της πρεσβυωπίας σε ασθενείς 45-55 ετών. Με βάση τα παραπάνω, η έρευνα για την διόρθωση της πρεσβυωπίας έστρεψε το ενδιαφέρον της εκ νέου στο επίπεδο του κερατοειδούς. Το τελευταίο, πολλά υποσχόμενο, επίτευγμα της επιστημονικής αυτής αναζήτησης είναι η κατασκευή ενδοκερατοειδικών διαθλαστικών ενθεμάτων 12. Το "FlexivueTM system " είναι μία τεχνική σχεδιασμένη να εισάγει ένα μικρού μεγέθους οπτικό φακό με θετική διαθλαστική δύναμη στο στρώμα του κερατοειδούς σε ένα σημείο ακριβώς απέναντι από το κέντρο της κόρης. Πρόκειται στην πραγματικότητα για ένα διπλοεστιακό φακό πάχους 15 μm και διαμέτρου 3 mm που τοποθετείται στον μη-επικρατούντα οφθαλμό. Λόγω της διπλοεστιακότητας του φακού η μακρινή όραση στο χειρουργημένο οφθαλμό επηρεάζεται πολύ λιγότερο από ότι με ένα κλασικό monovision.Με το φακό FlexivueTM τοποθετημένο, ο κερατοειδής γίνεται διπλοεστιακός. Το κεντρικό αναλλοίωτο τμήμα του κερατοειδούς οπού ο φακός είναι τοποθετημένος, προσφέρει ευκρινή μακρινή όραση και το περιφερικό τμήμα παρέχει ευκρινή κοντινή όραση.Κατά τη μακρινή όραση, οι φωτεινές ακτίνες του αντικειμένου που διέρχονται από την κεντρική plano ζώνη του ενθέματος και εκείνες που διέρχονται από την περιοχή του κερατοειδούς εξωτερικά του ενθέματος θα εστιαστούν στον αμφιβληστροειδή, ενώ οι ακτίνες του μακρινού αντικειμένου που διέρχονται από την περιφερική ζώνη του ενθέματος με τη διαθλαστική δύναμη θα εστιαστούν μπροστά από τον αμφιβληστροειδή και η θολή εικόνα που δημιουργούν θα απορριφθεί από το οπτικό σύστημα. Εστιάζοντας σε ένα κοντινό αντικείμενο, η κόρη φυσιολογικά συστέλλεται, οπότε διέρχονται μόνο οι κεντρικές φωτεινές ακτινοβολίες, αφού όμως διαπεράσουν πρώτα το ένθεμα. Οι φωτεινές ακτίνες του κοντινού αντικειμένου που διέρχονται από την κεντρική ζώνη του ενθέματος θα εστιάζονται πίσω από τον αμφιβληστροειδή και η θολή εικόνα που δημιουργούν απορρίπτεται από το οπτικό σύστημα. Οι φωτεινές ακτίνες του κοντινού αντικειμένου που διέρχονται από την περιφερική ζώνη του ενδοκερατοειδικού ενθέματος θα εστιάζονται στον αμφιβληστροειδή. Σαν αποτέλεσμα, μόνο η περιφερική ζώνη του ενθέματος παρέχει κοντινή διόρθωση και επηρεάζει τη μακρινή όραση, ενώ το κεντρικό τμήμα του ενδοκερατοειδικού φακού και η εκτός του ενθέματος ζώνη του κερατοειδούς δεν επηρεάζουν τη μακρινή όραση του ασθενούς.

scholarly journals Clinical Performance of Toris K Contact Lens in Patients with Moderate to Advanced Keratoconus: A Real Life Retrospective Analysis

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Ihsan Yilmaz ◽  
Ferah Ozcelik ◽  
Berna Basarir ◽  
Gokhan Demir ◽  
Gonul Durusoy ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Contact Lens ◽  
Contact Lenses ◽  
Clinical Performance ◽  
Real Life ◽  
Soft Contact Lenses ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
Central Cone ◽  
The Mean

Objectives.To evaluate the visual performance of Toris K soft contact lenses in patients with moderate-to-advanced keratoconus and also to compare the results according to cone types, cone location, and severity of keratoconus.Materials and Methods.Sixty eyes of 40 participants were included in this retrospective study. Uncorrected visual acuity (UCVA), best-spectacle corrected visual acuity (BCVA), best-contact lens corrected visual acuity (BCLCVA), and comfort rating via visual analogue scales (VAS) were measured.Results.The mean age was 27.3 ± 8.6 years (range: 18 to 54). The mean logMAR UCVA, BCVA, and BCLCVA were 0.85 ± 0.38 (range: 0.30–1.30), 0.47 ± 0.27 (range: 0.10–1.30), and 0.16 ± 0.20 (range: 0–1.00). There were significant increases in visual acuities with contact lenses (p<.05). BCLCVA was significantly better in oval type than globus type (p=.022). UCVA and BCLCVA were significantly better in moderate keratoconus group (p=.015,p=.018). The mean line gain in Snellen was 3.6 ± 1.8 lines (range: 0–7 lines). The mean line gain was higher in central cone group than paracentral cone group and oval group than globus group (p=.014,p=.045). The mean VAS score was 8.14 ± 1.88 (range: 6–10).Conclusions.Toris K can improve visual acuity of patients with keratoconus. Toris K is successful even in the moderate and advanced form of the disease.

scholarly journals Considerations of Visual Quality in Ocular Surgery as Presented at Dry Eye University

2020 ◽  
Vol 3 ((SP1)) ◽  
pp. e28-e29
Author(s):  
Frank Bowden
Keyword(s):  
Visual Acuity ◽  
Visual Experience ◽  
Visual Quality ◽  
Ocular Surgery ◽  
Optical Efficiency ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
Visual Phenomena ◽  
Visual Disturbances ◽  
Best Corrected Visual Acuity

Visual quality may be described as the visual experience which reflects the optimal optical efficiency of the eye. Patients undergoing ocular surgery expect improvement in visual acuity. Ocular surgeons typically aim to improve best-corrected visual acuity. Refractive surgeons, on the other hand, strive to improve uncorrected visual acuity. It is not uncommon that patients with excellent corrected visual acuity following surgery may be dissatisfied with visual quality which is less than anticipated due to unexpected visual disturbances. These visual phenomena may include ghosting, glare, halos, reduced contrast sensitivity, and visual fluctuation.

scholarly journals Corneal Cross-Linking for Progressive Keratoconus in Children: Our Experience

2012 ◽  
Vol 1 (1) ◽  
pp. 53-56 ◽  
Author(s):  
Erez Bakshi ◽  
Yaniv Barkana ◽  
Yakov Goldich ◽  
Isaac Avni ◽  
David Zadok
Keyword(s):  
Visual Acuity ◽  
Medical Center ◽  
Statistical Significance ◽  
Cross Linking ◽  
Long Term Stability ◽  
Corrected Visual Acuity ◽  
Department Of Ophthalmology ◽  
Manifest Refraction ◽  
Uncorrected Visual Acuity

ABSTRACT Purpose To assess the effect of corneal cross-linking on progressive keratoconus in children. Method In this retrospective study we enrolled nine eyes of nine consecutive children aged 11 to 17 years old who underwent corneal riboflavin-UVA induced cross-linking for progressive keratoconus at the Department of Ophthalmology at Assaf Harofeh Medical Center. They were followed for 6 to 24 months (average 16 ± 8.1 months). Evaluated parameters were uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), manifest refraction, pachymetry, slit lamp examination and corneal topography. Results Cross-linking resulted in stability of visual acuity in seven of the nine (77.8%) treated eyes. We found a nonsignificant improvement in UCVA and BSCVA with a small reduction of manifest cylinder. Furthermore, there was an improvement in spherical equivalent that was close to statistical significance (p = 0.07). There was 0.86 D reduction of average Kmax value postoperatively (p = 0.36). Most patients (7 of 9, 77.8%) showed a long-term stability or reduction in Kmax. Conclusion In this study, we demonstrated the efficacy of corneal cross-linking in arresting the progression of keratoconus in children. We believe that larger scale studies in this age group should be performed to further establish the relevance of this technique in children. How to cite this article Bakshi E, Barkana Y, Goldich Y, Avni I, Zadok D. Corneal Cross-Linking for Progressive Keratoconus in Children Our Experience. Int J Keratoco Ectatic Corneal Dis 2012;1(1):53-56.

scholarly journals Correction of postkeratoplastic astigmatism by intrastromal corneal segments implantation using a femtosecond laser

2021 ◽  
Vol 6 (6-1) ◽  
pp. 48-55
Author(s):  
N. A. Pozdeyeva ◽  
M. V. Sinitsyn ◽  
A. E. Terentieva ◽  
O. V. Shlenskaya
Keyword(s):  
Visual Acuity ◽  
Femtosecond Laser ◽  
Penetrating Keratoplasty ◽  
Biomechanical Properties ◽  
Corneal Graft ◽  
Corneal Resistance Factor ◽  
Astigmatism Correction ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
Best Corrected Visual Acuity

Background. After penetrating keratoplasty, mild to high induced corneal astigmatism was observed in each case. The existing choice of correction of postkeratoplastic astigmatism is aimed at fi nding an individual approach in order to compensate for it and not weaken the biomechanical properties of the corneal graft.The aim: to analyze the clinical, functional, and morphological results of postkeratoplastic astigmatism correction by implantation of intrastromal corneal segments using a femtosecond laser.Methods. 22 patients were examined before and 1 year after surgery. The operation was performed under local anesthesia: stage I – an intrastromal tunnel was formed using a femtosecond laser “Femto Visum” 1 MHz (Optosystems, Russia); stage II – the intrastromal corneal segments were implanted. The results were assessed using standard and special research methods using optical coherence tomography Visante OCT (Zeiss, Germany), keratotopography (Tomey-5, Japan), optical corneal analyzer ORA (Reichert, USA), laser tindalemetry FC-2000 (Kowa, Japan) and confocal microscope Confoscan-4 (Nidek, Japan).Results. Before the operation, uncorrected visual acuity averaged 0.09 ± 0.05, after a year – 0.50 ± 0.16; best corrected visual acuity – 0.30 ± 0.12 and 0.60 ± 0.05 respectively; cylindrical component of refraction – –10.29 ± 3.12 and –2.20 ± 0.64 D respectively; mean keratometry value – 43.59 ± 2.14 and 38.56 ± 1.75 D respectively; corneal hysteresis – 7.92 ± 1.22 and 8.95 ± 1.05 mm Hg respectively; corneal resistance factor – 7.01 ± 1.81 and 8.44 ± 1.44 mm Hg respectively; protein fl ux in the moisture of the anterior chamber – 2.97 ± 0.28 and 3.04 ± 0.24 f/ms respectively; endothelial cell density – 1521 ± 327 and 1475 ± 419 cells/mm2 respectively.Conclusion. Intrastromal corneal segments implantation into a corneal graft using a femtosecond laser has efficiency and safety method in correcting postkeratoplastic astigmatism.

Role of intravitreal ranibizumab for rapid recovery of central serous chorioretinopathy

2020 ◽  
Vol 14 (2) ◽  
pp. 78-82
Author(s):  
Kamran Shahzad ◽  
Syed Ahmer Hussain ◽  
Muhammad Zafarullah ◽  
Nausherwan Adil
Keyword(s):  
Visual Acuity ◽  
Central Serous Chorioretinopathy ◽  
Rapid Recovery ◽  
Post Injection ◽  
Intravitreal Ranibizumab ◽  
Corrected Visual Acuity ◽  
Department Of Ophthalmology ◽  
Best Corrected Visual Acuity

Background: Central serous chorioretinopathy (CSCR) is an idiopathic disorder in which there is leakage of fluid from hyper permeable choriocapillaris and the collection of fluid between neurosensory and neuropigmentry retina in the macular area that is responsible for decrease visual acuity. CSCR may be acute or chronic. Various treatment options include simple observation, argon laser photocoagulation of the leaking spot, photodynamic therapy (PDT), oral ketoconazole and oral rifampicin are available. Ranibizumab is a monoclonal antibody fragment that act as vascular endothelial growth factor inhibitor, stabilize blood retinal barrier and decrease leakage from choriocapillaris. This study aims to evaluate the role of intravitreal ranibizumab for rapid recovery in central serous chorioretinopathy. Patients and methods: This descriptive case series was carried out at Department of Ophthalmology, Nishtar Medical University Multan, Pakistan from 01-10-2019 till 30-04-2020. The study included twelve eyes of twelve patients suffering from acute CSCR. All patients were given a single injection of intravitreal ranibizumab (0.5mg/0.05ml) as a primary treatment and followed for two months after injection at one week, one month and two months interval to document efficacy of intravitreal ranibizumab. At each baseline and follow up visits, dilated fundus examination was carried out, ending up with patients’ best corrected visual acuity. Central retinal thickness (CRT) was also recorded and results were compared with prior visit results of patients. Major outcomes were the improvement in visual acuity and decrease in CRT. Baseline CRT values were also compared with post injection CRT values at one week, one month and two months intervals using paired sample t-test and best corrected visual acuity (BCVA) was compared using chi–square test. Results: Mean age of the patients was 39.6 years with a male to female ratio of 9:1. Best corrected visual acuity was 6/60 on Snellen chart at baseline. All patients exhibited mean improvement of best corrected visual acuity of three Snellen lines after one week. Eleven patients were back to best corrected visual acuity of 6/6 after one month. Remaining one patient gained best corrected visual acuity of 6/6 after two months of post injection. The mean CRT at presentation was 500 ± 80U (range; 386–580) which reduced significantly to 272 ± 52 U (range 220–338) from baseline after one month showing significant reduction (p<0.001). At the last follow-up visit, the CRT was measured 230 ± 20 U (range 220—250) which shows complete resolution of sub-retinal fluid. Conclusion: Intravitreal ranibizumab can be used for rapid absorption of sub-retinal fluid in acute CSCR and significant reduction in CRT along with improvement in BCVA indicate that it may be safely employed in CSCR to achieve better clinical outcomes.

Use of new-generation hybrid contact lenses for managing challenging corneas

2020 ◽  
pp. 112067212094275
Author(s):  
Ibrahim Inan Harbiyeli ◽  
Elif Erdem ◽  
Puren Isik ◽  
Meltem Yagmur ◽  
Reha Ersoz
Keyword(s):  
Visual Acuity ◽  
Medical Records ◽  
Contact Lenses ◽  
Corrected Visual Acuity ◽  
Manifest Refraction ◽  
Uncorrected Visual Acuity ◽  
The Mean ◽  
New Generation ◽  
Generation Hybrid ◽  
Irregular Astigmatism

Introduction: To evaluate the safety and efficacy of new-generation hybrid contact lenses (HCL) among patients with irregular astigmatism. Methods: Medical records of 25 patients fit with new-generation HCL (Eyebrid® and AirFlex®) were retrospectively reviewed. The data collected included etiology of irregular astigmatism, uncorrected visual acuity, manifest refraction, spectacle-corrected visual acuity (S-CDVA), steep / flat keratometric values, corneal astigmatism, records of rigid / soft CL fitted before HCL, all parameters of the trial lenses, and the final prescribed HCL parameters and HCL-CDVA. Results: The study included 34 eyes from 25 patients (nine females and 16 males) with an average age of 29 ± 13 (ranging from 8–56) years. In total, 25 eyes with keratoconus, four with post - keratoplasty astigmatism, three with irregular astigmatism due to corneal trauma and two with residual astigmatism after radial keratotomy were fit with HCL. The mean S-CDVA (logMAR) improved significantly from 0.76 ± 0.41 to 0.14 ± 0.15 with HCL ( p < 0.01). The most common indication for HCL was inability to fit with rigid gas permeable (RGP) lenses (22 eyes). The average number of lenses to successful fit was 1.4 (mode, 1; median, 1) and ideal fit was achieved with the first trial lens in 25 eyes (73%). Seven patients (nine eyes, 36%) discontinued lens use within the first 6 months because of discomfort (six eyes, 24%), ocular allergy (two eyes, 8%) and tearing of contact lens (one eye, 4%). Discussion: New-generation HCL may be a suitable option for fitting challenging corneas with irregular astigmatism that cannot be rehabilitated efficiently with rigid lenses.

scholarly journals Scheimpflug Topography Oriented Adequate Repositioning of a Misaligned Free Flap after Laser in situ Keratomileusis

2021 ◽  
pp. 889-893
Author(s):  
Ha Eun Sim ◽  
Min Ji Kang ◽  
Jee Hye Lee ◽  
Seung Hwa Baik ◽  
Sun Young Kim ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Free Flap ◽  
Laser In Situ Keratomileusis ◽  
Clockwise Rotation ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
The Right ◽  
Original Configuration ◽  
Irregular Astigmatism

This report describes a case of Scheimpflug topography oriented adequate repositioning of a misaligned thick free flap after laser in situ keratomileusis (LASIK). A 24-year-old patient consulted for irregular astigmatism and disoriented free right eye flap. The patient previously underwent binocular LASIK at a private clinic. During the right eye surgery, the flap was repositioned after laser ablation due to the free flap. The free flap was not repositioned to its original configuration due to insufficient preoperative corneal marking. On examination, the uncorrected visual acuity was 0.4, and refractive power was +2.00 Dsph with −4.25 Dcyl axis 66 in the right eye. Scheimpflug topography revealed irregular right eye astigmatism. The sagittal curvature of topography showed a 40° counterclockwise misalignment of the steep axis of the cornea. The free flap was repositioned by 40° clockwise rotation. After this, the refractive corneal power improved to −1.00 Dsph with −1.00 Dcyl Axis 19 in the right eye. The uncorrected and best-corrected visual acuity improved to 20/30 and 20/25 (x − 0.25Dsph −1.25 Dcyl A20), respectively. This is the first report on free flap repositioning using Scheimpflug topography. As proper flap positioning was compromised because of the free LASIK flap with no preoperative corneal marking, the flap was effectively repositioned using Scheimpflug topography.

scholarly journals Clinical Experience of Using Intraocular Lenses

2019 ◽  
Vol 16 (3) ◽  
pp. 304-309
Author(s):  
A. D. Chernysheva ◽  
V. O. Afanasyeva
Keyword(s):  
Visual Acuity ◽  
Postoperative Period ◽  
Early Postoperative Period ◽  
Intraocular Lenses ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
The Mean ◽  
Basic Studies ◽  
The Given ◽  
Observation Period

Aim: to analyze the data obtained from using of intraocular lenses — the hydrophobic IOL Citrin and a hydrophilic IOL Aquamarine, produced by Russian company — NanOptic. Materials and methods. A total of 56 IOLs, produced by NanOptic (38 hydrophobic IOLs Citrine and 18 hydrophilic IOLs Aquamarine) were implanted. The observation period was from 3 to 12 months. The indication for phacoemulsification was age cataract. The age of the patients was 54–85. Patients before the operation were conducted basic studies. The mean uncorrected visual acuity before the operation was (UCVA) 0.121 ± 0.120 (0.001–0.3), and the mean corrected visual acuity was (BCVA) 0.187 ± 0.140 (0.001–0.6). All patients underwent standard phacoemulsification. Results. The early postoperative period was without any complications. In the postoperative period the mean UCVA in patients with “Citrine” and “Aquamarine” was 0.90 ± 0.10 (0.7–1.0) and 0.96 ± 0.07 (0.8–1.0) accordingly, and the mean BCVA was 0.94 ± 0.07 (0.8–1.0) and 0.99 ± 0.02 (0.9–1.0) accordingly. In all cases, the refraction obtained was consistent with the prediction. The error in IOL calculation was minimal and permissible. There weren’t any case of secondary cataract in patients with hydrophobic IOLs, and 3 cases of lens posterior capsule fibrosis of 1 degree in patients with hydrophilic IOLs in 3–12 months observation. The position of IOL in capsule bag was stable. Conclusions. The results of implantation of new Russian-made IOLs on the given parameters appeared to be satisfactory, that allows to recommend them for implantation in cataract surgery.

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