Abstract
Purpose: To report the clinical visual performance of different front surface eccentricity (FSE) in patients with corneal ectasia.
Method: Records of 17 subjects fitted with the PROSE (Prosthetic Replacement of the Ocular Surface Ecosystem), a fluid-ventilated gas-permeable scleral lens, for corneal ectasia (keratoconus, pellucid marginal degeneration, post-Lasik ectasia) were reviewed. BCVA and subjective reporting of glare and distortion of letters with front surface eccentricity of 0, and 0.6 were compared. Best corrected high and low contrast visual acuity, glare, and ocular aberrations are measured with different FSE.
Results: 10 subjects of the 17 subjects reported distortion and glare with zero front surface eccentricity and showed improved visual acuity from0.3 to 0.1 Log MAR units. Subjects with corneal scarring showed varied results. There were significant changes observed in the higher order aberrations with zero and 0.6 FSE.
Conclusions: FSE modulates visual performance which in-turn could be due to changes in higher order aberrations. Corneal scar in the ectatic eyes were also found to change the BCVA with different FSE. Understanding the impact of FSE on visual performance may allow for optimization of vision in patients treated with PROSE for corneal ectasia.
Method: Records of 17 subjects fitted with the PROSE (Prosthetic Replacement of the Ocular Surface Ecosystem), a fluid-ventilated gas-permeable scleral lens, for corneal ectasia (keratoconus, pellucid marginal degeneration, post-Lasik ectasia) were reviewed. BCVA and subjective reporting of glare and distortion of letters with front surface eccentricity of 0, and 0.6 were compared. Best corrected high and low contrast visual acuity, glare, and ocular aberrations are measured with different FSE.
Results: 10 subjects of the 17 subjects reported distortion and glare with zero front surface eccentricity and showed improved visual acuity from0.3 to 0.1 Log MAR units. Subjects with corneal scarring showed varied results. There were significant changes observed in the higher order aberrations with zero and 0.6 FSE.
Conclusions: FSE modulates visual performance which in-turn could be due to changes in higher order aberrations. Corneal scar in the ectatic eyes were also found to change the BCVA with different FSE. Understanding the impact of FSE on visual performance may allow for optimization of vision in patients treated with PROSE for corneal ectasia.
| Original language | English |
|---|---|
| Pages | 1-1 |
| Number of pages | 1 |
| Publication status | Published - 2012 |
| Externally published | Yes |