scholarly journals Anatomical and Visual Outcomes after LASIK Performed in Myopic Eyes with the WaveLight® Refractive Suite (Alcon® Laboratories Inc., USA)

2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
Imene Salah-Mabed ◽  
Sarah Moran ◽  
Emmanuelle Perez ◽  
Guillaume Debellemanière ◽  
Damien Gatinel
Keyword(s):  
Contrast Sensitivity ◽  
Dry Eye ◽  
High Myopia ◽  
Spherical Aberration ◽  
Case Series ◽  
Corneal Aberrations ◽  
Quality Of Vision ◽  
Eye Symptoms ◽  
Dry Eye Symptoms

Purpose. To evaluate changes in corneal anatomy and quality of vision following LASIK refractive surgery for mild to high myopia using the WaveLight® Refractive Suite (Alcon® Laboratories Inc., USA). Setting. Rothschild Foundation, Paris, France. Design. Prospective interventional case series. Methods. We examined 60 myopic eyes (average SE −4.5 D, from −9.3 to −0.75 D) of 30 patients from 21.3 to 38.7 years old. Pachymetry, keratometry, Q factor, corneal aberrations, visual acuity (VA), contrast sensitivity, dry eye assessment, and quality of vision were measured preoperatively, one day (D1), and 1, 3, and 6 months postoperatively. Results. 6 months postoperatively, keratometry became flatter, and the Q factor became more oblate (from −0.18 ± 0.08 to +0.19 ± 0.06). Pachymetry decreased by 117.9 ± 62.2 µm at D1 and increased by 37.87 ± 32.6 µm between D1 and M6. Refraction was emmetropic at D1 and remained stable thereafter. Six months after surgery, VA was slightly but nonsignificantly improved (<0.05 log MAR), whereas contrast sensitivity remained unchanged. Quality of vision was not affected by surgery and was more related to dry eye symptoms than to corneal HOAs (r2 = 0.49; p<0.001 vs. r2 = 0.03; p<0.001). Conclusions. LASIK surgery for moderate to high myopia, performed with the WaveLight® Refractive Suite, showed good postoperative outcomes, with demonstrated safety, predictability, efficiency, and stability. This is probably due to well-controlled spherical aberration and the use of large optical zones. Besides, we can assume that the patients’ quality of vision depends more on the postoperative dry eye disease generated by the laser than on the induced HOAs.

scholarly journals Visual Outcomes and Higher Order Aberrations Following LASIK on Eyes with Low Myopia and Astigmatism

2018 ◽  
Vol 12 (1) ◽  
pp. 84-93 ◽  
Author(s):  
Smita Agarwal ◽  
Erin Thornell ◽  
Chris Hodge ◽  
Gerard Sutton ◽  
Paul Hughes
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
Spherical Aberration ◽  
Higher Order ◽  
Higher Order Aberrations ◽  
Corneal Aberrations ◽  
Spatial Frequencies ◽  
Quality Of Vision ◽  
Recent Developments

Background: Laser-Assisted in situ Keratomileusis (LASIK) can induce corneal aberrations that can impact vision and patient satisfaction. Recent developments in laser technologies have helped minimise these aberrations. Objective: To assess the quality of vision and change in Higher-Order Aberrations (HOAs) following wavefront-optimized LASIK in low-myopic astigmatic patients. Methods: LASIK was performed on a total of 76 eyes in patients with myopia <4.0 D and cylinder <2.0 D using the WaveLight® EX500 excimer and FS200 femtosecond laser platform. Visual acuity, contrast sensitivity and HOAs were measured at 1 and 3 months postoperatively and compared to preoperative values. Subjective quality of vision was assessed pre- and postoperatively using a VF14 questionnaire. Results: Mean postoperative Spherical Equivalent (SE) was -0.09 ± 0.26 µm with 95% of patients within ± 0.5 D of attempted SE. Postoperative uncorrected distance visual acuity was 20/20 or better for 96% of patients. Contrast sensitivity increased against horizontal and vertical gratings at all spatial frequencies except for vertical gratings at 18 cycles/degree. Spherical aberration and total HOA increased by 0.085 µm and 0.13 µm respectively. The mean VF14 score increased from 89.2 ± 16.7% to 99 ± 1.4% postoperatively. Conclusion: LASIK performed using the WaveLight® EX500 excimer and WaveLight® FS200 laser platform provided improved contrast sensitivity and visual acuity with minimal introduction of HOAs, making it a suitable platform for low myopic astigmatic patients.

Assessment Of Dry Eye Symptoms And Quality Of Sleep In Engineering Students During The Covid-19 Pandemic

2020 ◽  
Vol 11 (SPL1) ◽  
pp. 1202-1207
Author(s):  
Pavithra S ◽  
Dheepak Sundar M
Keyword(s):  
Sleep Quality ◽  
Dry Eye ◽  
Screen Time ◽  
Engineering Students ◽  
Statistical Tests ◽  
Quality Of Sleep ◽  
Cross Sectional ◽  
Eye Symptoms ◽  
Dry Eye Symptoms

To assess dry eye symptoms (DES) and quality of sleep in engineering students during the Covid19 pandemic lockdown and also to assess the association between DES and sleep quality. A cross-sectional questionnaire-based study was carried out among 396 engineering students studying in Saveetha engineering college. The study tool used was a semi-structured google form questionnaire designed for assessing digital device usage, symptoms of dry eye disease and sleep pattern. Responses were analyzed using appropriate statistical tests. Overall 64.1% attained a score of more than 10, indicating the presence of DES. 70.2% of the study population used digital screens for more than 13 hours. A statistically significant association was found between increased screen time and presence of DES(p<0.05). 64.9% had a score of >18 indicating reduced sleep quality. About 77.1% of the students with DES had reduced sleep quality, and a significant association (p<0.01) was observed between the two. During the Covid19 pandemic lockdown, there appears to be rising prevalence of DES in student population, one of the reasons being increased screen time. The sleep quality was also found to be reduced, and a significant association was found between DES and sleep quality.

scholarly journals The Association between Preoperative Dry Eye Symptoms and Postoperative Discomfort in Patients Underwent Photorefractive Keratectomy

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Gilad Rabina ◽  
Ingibjorg Iris Boguslavsky ◽  
Michael Mimouni ◽  
Igor Kaiserman
Keyword(s):  
Postoperative Pain ◽  
Dry Eye ◽  
Subjective Evaluation ◽  
Case Series ◽  
Photorefractive Keratectomy ◽  
Ocular Surface Disease Index ◽  
Retrospective Case ◽  
Significant Difference ◽  
Eye Symptoms ◽  
Dry Eye Symptoms

Purpose. To investigate the association between preoperative dry eye symptoms on postoperative pain and discomfort after photorefractive keratectomy (PRK). Methods. A retrospective case series of 151 consecutive patients, who underwent myopic PRK in both eyes between 5/2016 and 5/2017. Patients with positive dry eye disease (DED) signs on clinical examination or with known DED were excluded. Patients underwent a subjective evaluation for dry eye symptoms using ocular surface disease index (OSDI) and modified standard patient evaluation of eye dryness (SPEED) questionnaires. One day postoperatively, the patients were evaluated again by a questionnaire of pain, discomfort, photophobia, foreign body sensation, satisfaction with vision, and frequency of usage of anesthetic drops. Results. Fifty-two patients had any preoperative dry eye symptoms (OSDI score > 0) compared to 99 nonsymptomatic patients (OSDI score of 0). Postoperatively, the symptomatic dry eye patients suffered significantly more pain than the nondry eye patients (p=0.02). Thirteen patients had a cumulated modified SPEED score >4 (moderate to severe) in comparison to 138 patients with score of 0–4 (non to mild). Patients with moderate to severe preoperative symptoms suffered more pain (p=0.006), photophobia (p=0.005), and epiphora (p=0.03). No statistically significant difference was seen in postoperative subjective visual quality (p=0.82) between the two groups. Conclusion. Preoperative dry eye symptoms may be associated with postoperative pain, epiphora, and photophobia and thus influence negatively on patient satisfaction with this procedure.

scholarly journals Dry Eye Symptoms and Ocular Pain in Veterans with Glaucoma

2019 ◽  
Vol 8 (7) ◽  
pp. 1076 ◽  
Author(s):  
Aubrey R Tirpack ◽  
Elizabeth Vanner ◽  
James M Parrish ◽  
Anat Galor ◽  
Hong-Uyen Hua ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Dry Eye ◽  
Veterans Affairs ◽  
Ocular Pain ◽  
Associated Symptoms ◽  
Eye Symptoms ◽  
Pain Symptoms ◽  
Substantial Morbidity ◽  
Dry Eye Symptoms

Dry eye and glaucoma are two frequently encountered ocular conditions, which can lead to substantial morbidity and decreased quality of life. Patients on topical glaucoma medications are known to be at greater risk for ocular surface symptoms. Veterans seen in the eye clinics at the Miami Veterans Affairs Hospital from January to July 2016 completed surveys assessing dry eye and ocular pain symptoms, including the five item Dry Eye Questionnaire (DEQ5). A total of 62 patients with glaucoma completed the survey. Of those, 52 were on glaucoma medications at the time of the survey, with the majority requiring more than one medication to control intraocular pressure. The frequency of mild or greater dry eye symptoms (defined as DEQ5 >6) tended to increase with increasing medication burden, and patients on brimonidine were more likely to report a DEQ5 >6. Patients on three or more glaucoma medications were more likely to report symptoms of shooting pain, dryness, and itchiness. Patients using timolol were more likely to report throbbing and pain by light, while those on latanoprost reported stinging. Our data support an association between increasing number of glaucoma medications and worsening of dry eye symptoms. Patient and medication-associated symptoms can be used to tailor individual medication regimens.

Botulinum A Toxin Injection as a Treatment for Blepharospasm

2020 ◽  
pp. 275-278
Author(s):  
Alan D. Penman ◽  
Kimberly W. Crowder ◽  
William M. Watkins
Keyword(s):  
Cerebrovascular Disease ◽  
Dry Eye ◽  
Case Series ◽  
Orbicularis Oculi ◽  
Eyelid Surgery ◽  
Botulinum A Toxin ◽  
Duration Of Effect ◽  
Eye Symptoms ◽  
Dose Dependent ◽  
Dry Eye Symptoms

In this chapter a case series is described of the use of botulinum A toxin for the treatment of blepharospasm in thirty-nine patients with blepharospasm due to various causes—essential, Meige’s syndrome, hand apraxia, cerebrovascular disease, and parkinsonism. A reduction of abnormal movement occurred in all patients, lasting up to 170 days. Both the amount and the duration of effect were dose dependent. Tearing, dry-eye symptoms, or transient ptosis occurred in 20% of injections, especially in patients who had had previous eyelid surgery. Botulinum A toxin injection into the orbicularis oculi muscle was found to be a safe, simple, and symptomatically helpful treatment for blepharospasm that can be repeated at intervals as required.

scholarly journals Long-term impact of dry eye symptoms on vision-related quality of life after phacoemulsification surgery

2018 ◽  
Vol 39 (2) ◽  
pp. 419-429 ◽  
Author(s):  
Wenwen Xue ◽  
Ming-ming Zhu ◽  
Bi-jun Zhu ◽  
Jian-nan Huang ◽  
Qian Sun ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Dry Eye ◽  
Related Quality ◽  
Eye Symptoms ◽  
Long Term Impact ◽  
Dry Eye Symptoms

scholarly journals Changes of Corneal Wavefront Aberrations in Dry Eye Patients after Treatment with Artificial Lubricant Drops

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Ning Lu ◽  
Fangyu Lin ◽  
Zhu Huang ◽  
Qin He ◽  
Wei Han
Keyword(s):  
Dry Eye ◽  
Spherical Aberration ◽  
Optical Quality ◽  
Control Group ◽  
Eye Drops ◽  
Artificial Eye ◽  
Corneal Surface ◽  
Wavefront Aberrations ◽  
Corneal Aberrations

Purpose.To evaluate the corneal aberration changes in dry eye patients after treatment with artificial eye drops.Methods.Thirty mild to moderate dry eye patients treated with artificial eye drops and twenty comparable dry eye patients were recruited as controls. Anterior corneal aberrations over 3 mm and 5 mm analytical zones including total, 3rd to 5th high order aberrations (HOAs), spherical aberration (SA), and vertical (V-coma) and horizontal coma (H-coma) obtained from corneal topography data at baseline and 2 weeks after treatment were evaluated.Results.For 3 mm zone, trefoils, V-coma, H-coma terms, and 3rd and 5th HOAs were significantly decreased (p<0.05) in the treatment group. For 5 mm zone, instillation of eye drops reduced H-coma, SA terms, 3rd to 5th orders, and total HOAs all showed a significant decrease (p<0.05). The root mean square analysis of the Zernike terms also showed similar statistical results. For control group, all individual terms and total HOAs did not have significant changes over 3 mm and 5 mm zones (p>0.05).Conclusions.Treatment with artificial eye drops can effectively improve the corneal optical quality of dry eye patients by ameliorating the HOAs of anterior corneal surface.

scholarly journals Effect of Photorefractive Keratectomy and Laser in situ Keratomileusis in High Myopia on logMAR Visual Acuity and Contrast Sensitivity

2003 ◽  
Vol 46 (1) ◽  
pp. 15-18 ◽  
Author(s):  
Hana Langrová ◽  
Matthias Derse ◽  
Dagmar Hejcmanová ◽  
Alena Feuermannová ◽  
Pavel Rozsíval ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Contrast Sensitivity ◽  
High Myopia ◽  
Laser In Situ Keratomileusis ◽  
Photorefractive Keratectomy ◽  
Spherical Equivalent ◽  
Spatial Frequencies ◽  
Quality Of Vision

Purpose: To compare effect of photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) on contrast sensitivity (CS) and best corrected visual acuity (BCVA) in high myopia. Methods: 38 myopes (PRK) and 31 patients (LASIK) were examined before and 1, 3, 6, and 12 months postoperatively. Mean preoperative spherical equivalent was -8.0 ± 1.7D (PRK) and -9.2 ± 2.1D (LASIK). CS was tested on a computerized system of the Contrast Sensitivity 8010 Type at 6 spatial frequencies (0.74 and 29.55 c/deg), BCVA was measured on logMAR charts. Results: At 12 months postoperatively, mean spherical equivalent was -0.6 ± 1.0D (PRK) and -1.0 ± 0.8D (LASIK). Postoperative values of CS were significantly higher in the PRK group, except for spatial frequencies of 3.69 and 7.39 c/deg up to 3 months postoperatively. The initial significant decrease of BCVA lasted up to 6 months after PRK. In the LASIK group BCVA was not significantly different from its preoperative level at the 3-months follow-up. Conclusions: The significant improvement of CS after PRK suggest that PRK can improve quality of vision in eyes with high myopia. Although recovery of BCVA after LASIK was faster than after PRK, there may be a persistent decrease in CS.

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