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 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.

Corneal densitometry in patients with keratoconus undergoing intrastromal Ferrara ring implantation

2021 ◽  
pp. 112067212110206
Author(s):  
Pablo Felipe Rodrigues ◽  
Bernardo Kaplan Moscovici ◽  
Guilherme Ferrara ◽  
Luciano Lamazales ◽  
Marcela Mara Silva Freitas ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Medical Records ◽  
Spherical Equivalent ◽  
Interventional Study ◽  
Data Comparison ◽  
Corneal Densitometry ◽  
Corrected Visual Acuity ◽  
Ring Segment ◽  
The Mean

Objective: Evaluation of central corneal densitometry changes following Ferrara corneal ring segment implantation in patients with keratoconus, especially the correlation between corneal densitometry and keratometry. Methods: Retrospective, non-comparative, interventional study based on the review of medical records of patients diagnosed with keratoconus who underwent Ferrara corneal ring segment implantation. Pre and post-operative corneal densitometry measurements obtained with Pentacam HR (Oculus, Wetzlar, Germany) were analyzed. The follow-up time was 3 months, and data comparison was made, using specific statistical analysis, with the data of 3 months postoperatively. Results: The study sample consisted of 43 eyes of 36 patients. The mean corrected visual acuity improved from 0.82 LogMAR preoperatively (SD ± 0.33) to 0.19 LogMAR (SD ± 0.13) postoperatively. The mean spherical equivalent varied from −4.63 (SD ± 3.94) preoperatively to −2.16 (SD ± 2.63) postoperatively. Asphericity varied from −0.69 (SD ± 0.32) preoperatively to −0.27 (SD ± 0.31) postoperatively. The mean maximum K was 54.01D (SD ± 3.38) preoperatively and 51.50D (SD ± 2.90) postoperatively. The mean anterior densitometric value was 18.26 (SD ± 2.03) preoperatively and 17.66 (SD ± 1.84) postoperatively. Conclusion: Corneal densitometry is an interesting technology that should be studied in keratoconus patients. Our results suggest that the corneal densitometry in the cornea’s anterior layer reduces after ICRS implantation and correlates with corneal keratometry. Further studies should be performed to increase the knowledge in this field.

scholarly journals The effect of amblyopia on clinical outcomes of children with astigmatism

2021 ◽  
Vol 13 ◽  
pp. 251584142110408
Author(s):  
Burçin Çakır ◽  
Nilgün Özkan Aksoy ◽  
Sedat Özmen ◽  
Özlem Bursalı
Keyword(s):  
Visual Acuity ◽  
Clinical Outcomes ◽  
Medical Records ◽  
Convergence Insufficiency ◽  
Corrected Visual Acuity ◽  
Ocular Deviation ◽  
The Mean ◽  
The Difference ◽  
Best Corrected Visual Acuity

Background: Amblyopia is more common in children with high astigmatism, but factors contributing to development of amblyopia and visual outcomes are not fully understood. Objective: To evaluate the effect of amblyopia on the clinical outcomes in children with ⩾1.75 diopter (D) astigmatism. Methods: We reviewed the medical records of children with ⩾1.75 D astigmatism with and without amblyopia (amblyopes group and non-amblyopes group). The mean age, gender, amount and type of ocular deviation, presence of convergence insufficiency (CI), stereopsis, time of initial spectacle use and follow-up time, differences in best-corrected visual acuity (VoD) and spherical equivalent (SE) between eyes were assessed and compared between the groups. Best-corrected visual acuity (BCVA), mean SE, astigmatism measurements were assessed and compared between amblyopic, fellow, and non-amblyopic eyes. Results: The records included 68 eyes of 34 children with amblyopia and 56 eyes of 28 children without amblyopia. The mean age, gender, amount and type of ocular deviation, presence of CI, stereopsis, time of initial spectacle use, follow-up time, and the difference in SE did not differ between groups. In amblyopes, exodeviation was more common and statistically greater in near (33 cm) than at distance (6 m) (p = 0.005). The mean BCVA and astigmatism values were statistically different between amblyopic, fellow, and non-amblyopic eyes. Conclusion: A greater near than distance exodeviation and higher mean astigmatism value were found in amblyopic children with astigmatism.

Topographically Guided Two-Step LASIK and Standard LASIK in the Correction of Refractive Errors after Penetrating Keratoplasty

2009 ◽  
Vol 19 (4) ◽  
pp. 535-543 ◽  
Author(s):  
Leopoldo Spadea ◽  
Massimo Saviano ◽  
Angela Di Gregorio ◽  
Domenico Di Lodovico ◽  
Fabio De Sanctis
Keyword(s):  
Visual Acuity ◽  
Penetrating Keratoplasty ◽  
Laser In Situ Keratomileusis ◽  
Refractive Errors ◽  
Manifest Refraction ◽  
Uncorrected Visual Acuity ◽  
The Mean ◽  
Group 2 ◽  
Group 1

Purpose To evaluate in a long-term period the effectiveness and safety of topographically guided two-step laser in situ keratomileusis (LASIK) and standard LASIK technique in the correction of refractive errors after successful penetrating keratoplasty (PKP) for keratoconus. Methods At least 2 years after PKP and 6 months after removal of all sutures, 15 eyes of 15 patients (Group 1; mean manifest refraction spherical equivalent (MRSE) −7.23 D ± 3.42 SD) were submitted to standard LASIK and 15 eyes of 15 patients (Group 2; mean MRSE −4.37 D ± 1.97 SD) to a topographically guided two-step LASIK procedure (first the flap and at least 2 weeks later the laser ablation). In all cases, a superior hinged corneal flap (160 μm/9.5 mm) was created. Results After a follow-up of 36 months, in Group 1 the mean uncorrected visual acuity (UCVA) was 0.51 logarithm of the minimum angle of resolution (logMAR) ± 0.41 SD and the mean best-corrected visual acuity (BCVA) was 0.03 logMAR ± 0.05 SD, with a mean MRSE of −1.57 D ± 2.65 SD. In Group 2, the mean UCVA was 0.28 logMAR ± 0.24 SD and the mean BCVA was 0.01 logMAR ± 0.03 SD, with a mean MRSE of −0.07 D ± 1.00 SD. In both groups, no complications were observed. Conclusions After a long follow-up period, both topographically guided two-step LASIK and standard LASIK could be considered effective and safe tools in the correction of refractive errors after successful PKP for keratoconus.

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 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.

Toric intraocular lens for correction of high corneal astigmatism in cataract patients

2020 ◽  
Vol 1 (2) ◽  
pp. 83-88
Author(s):  
Irene Simo ◽  
◽  
Laura Remón ◽  
Keyword(s):  
Visual Acuity ◽  
Intraocular Lens ◽  
Medical Engineering ◽  
Toric Intraocular Lens ◽  
Toric Iol ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
Before And After ◽  
The Mean ◽  
Axis Rotation

AIM: To evaluate the efficacy of Bi-Flex toric intraocular lens (T-IOL; Medicontur, Medical Engineering, Ltd., Inc.) implantation to correct preexisting astigmatism in patients having cataract surgery. METHODS: This retrospective consecutive study included 22 eyes of 16 patients with more than 2.50 diopters (D) of corneal preexisting astigmatism having cataract. Preoperative and postoperative uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), objective and subjective refraction and keratometric and topographic cylinder were measured. Postoperative the toric IOL axis was evaluated using vector analysis. RESULTS: Postoperatively, subjective refractive cylinder was reduced significant (P<0.05) from 4.05±1.53 D to 1.35±0.86 D. The component J0 reduced in magnitude from -0.81±2.02 D to -0.12±0.62 D (P<0.05). Both, UCVA and BCVA improved significantly at 1mo after surgery (P<0.05 in both cases). After the surgery, the UCVA and BCVA were 0.24±0.19 and 0.06±0.08, respectively. The mean toric IOL axis rotation was 2.95±5.25 degree, with rotation less than 10 degrees in 86.36% of eyes. No differences in mean keratometric values obtained before and after surgery were found (P>0.05 for J0 and J45). CONCLUSION: Implantation of the Bi-Flex toric IOL is a safe and effective method to correct the preexisting regular astigmatism (greater than 2.50D).

scholarly journals Prevalence and Profile of Central Serous Chorioretinopathy in an Indian Cohort

2019 ◽  
Vol 11 (1) ◽  
pp. 5-10
Author(s):  
Niroj Kumar Sahoo ◽  
Sumit Randhir Singh ◽  
Priyanka Kammari ◽  
Ganesh Babu Jonnadula ◽  
Anthony Vipin Das ◽  
...  
Keyword(s):  
Visual Acuity ◽  
South India ◽  
Steroid Use ◽  
Shift Workers ◽  
Patient Profile ◽  
Corrected Visual Acuity ◽  
Uncorrected Visual Acuity ◽  
History Of ◽  
The Mean ◽  
Set Up

Aims: To determine the profile of CSCR patients from a tertiary health care set-up in India. Methods and Material: A total of 2780 (2447 males and 333 females) patients with a diagnosis of CSCR were included. Data regarding the demographics, profile of CSCR and systemic diseases, if any, were collected from a tertiary eye care network in South India from January 2012 to December 2016. Results: The prevalence of CSCR was found to be 1.7% (A total 2780 patients, with mean age of 42.3±10.1 years). A total of 2031 patients had a unilateral and 749 had bilateral involvement. Acute and chronic CSCR was seen in 1932 (69.5%) and 848 (30.5%) eyes respectively. The mean uncorrected visual acuity of the patients was 0.51±0.45 log MAR (Snellen equivalent 20/60) while the mean best corrected visual acuity was 0.32±0.40 log MAR (Snellen equivalent 20/40). History of smoking and steroid use was present in 214 (7.7%) and 758 (27.3%) individuals respectively. Hypertension and diabetes mellitus was present in 106 (3.8%) and 51 (1.8%) patients respectively. Most of patients {824 (29.6%) patients} were shift-workers. Laser was done in 336 (12.1%) acute and 223 (8%) chronic CSCR patients. Photodynamic therapy was used in 12 acute and 12 chronic cases. Conclusion: Prevalence of CSCR was 1.7%. The study provides an overview of patient profile among Indian subjects.

scholarly journals Combined Intacs SK and Corneal Collagen Cross-linking for the Treatment of Keratoconus

2012 ◽  
Vol 1 (2) ◽  
pp. 109-116 ◽  
Author(s):  
Hanna Garzozi
Keyword(s):  
Visual Acuity ◽  
Combined Treatment ◽  
Cross Linking ◽  
Corneal Resistance Factor ◽  
Corrected Visual Acuity ◽  
Manifest Refraction ◽  
Uncorrected Visual Acuity ◽  
Significant Change ◽  
Collagen Cross Linking ◽  
Corneal Collagen

ABSTRACT Purpose To evaluate the efficacy of the combined treatment of Intacs SK (Severe keratoconus) and corneal collagen cross- linking in the management of advanced keratoconus (KC). Setting Private laser center, Haifa, Israel. Affiliated to Hadassah Hospital, Jerusalem. Methods This is a retrospective study. Intacs SK were implanted using manual technique in eyes with moderate-to- severe keratoconus followed by collagen corneal cross-linking (CXL). Evaluation included uncorrected visual acuity (UCVA), best spectacle corrected visual acuity (BSCVA), manifest refraction, slit-lamp examination and corneal topography. Ocular response analyzer (ORA) was used to assess the corneal hysteresis (CH) and the corneal resistance factor (CRF). Results We report on improvement of the UCVA, BSCVA, decrease in myopia, astigmatism and keratometry readings. No significant change in CRF or CH was noted. Conclusion The combined treatment of Intacs SK and corneal CXL for the treatment of advanced keratoconus is safe and effective. The combined treatment resulted in improved UCVA, BSCVA, keratometry readings and regularization of the topography but no significant change in CRF and HS. How to cite this article Barbara R, Garzozi H, Barbara A. Combined Intacs SK and Corneal Collagen Cross-linking for the Treatment of Keratoconus. Int J Kerat Ect Cor Dis 2012;1(2):109-116.

Sign in / Sign up

Export Citation Format

Share Document