Optical coherence tomography to evaluate the interaction of different edge designs of four different silicone hydrogel lenses with the ocular surface
| Autor: | Turhan SA, Toker E |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Clinical Ophthalmology, Vol 2015, Iss default, Pp 935-942 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1177-5483 43467806 |
| Popis: | Semra Akkaya Turhan, Ebru Toker Department of Ophthalmology, School of Medicine, University of Marmara, Istanbul, Turkey Purpose: To evaluate the lens edge interaction with the ocular surface with different edge designs using optical coherence tomography and to examine the effect of lens power on the lens edge interactions. Methods: Four types of silicone hydrogel lenses with different edge designs (round-, semi-round-, chisel-, and knife-edged) at six different powers (+5.0, +3.0, +1.0, -1.0, -3.0, and -5.0 diopters) were fitted to both eyes of 20 healthy volunteers. Optical coherence tomography images were taken at the corneal center and at the limbus within 15–30 minutes after insertion. The images were evaluated with respect to two parameters: conjunctival indentation exerted by the lens edge; and the tear film gaps between the posterior surface of the lens and the ocular surface. The amount of conjunctival indentation was measured with the distortion angle of the conjunctiva at the lens edge. Results: The degree of conjunctival indentation was highest with the chisel-edged design followed by the semi-round design (P |
| Databáze: | Directory of Open Access Journals |
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