Abstract
A number of surgical techniques has been developed to correct ametropia (refractive defaults) of the eye by changing the anterior corneal radius. Because the air-cornea interface makes up for about two-third of the refractive power of the eye, a refractive correction is obtained by a suitable photoablation of the cornea. For this purpose, an ArF excimer laser which emits a wavelength of 193 nm is being used. After a mechanical removal of the epithelium, the Bowman's layer and the corneal stroma are photoablated on typically 50% of the central surface of the cornea with various precomputed shapes. After regrowth of the epithelium, a smooth interface with air develops itself, which can be attributed to a mechanical equilibration. Yet, SEM studies have shown that irregularities can remain in the new stromal surface. This study is an attempt to quantify the vision blur as a function of the deformation observed at the epithelium-stroma interface.
Original language | English (US) |
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Pages (from-to) | 89-93 |
Number of pages | 5 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 1423 |
State | Published - Jan 1 1991 |
Externally published | Yes |
Event | Proceedings of Ophthalmic Technologies - Los Angeles, CA, USA Duration: Jan 21 1991 → Jan 22 1991 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering