Change in Accommodation and Ocular Aberrations in Keratoconus Patients Fitted With Scleral Lenses. (September 2018)

• Record Type: Journal Article
• Authors: Yildiz, Elvin; Toklu, Meltem Tunca; Vural, Ece Turan; Yenerel, Nursal Melda; Bardak, Handan; Kumral, Esra Turkseven; Bardak, Yavuz
• Is Part Of: Eye & contact lens. Volume 44(2018:Sep.)Supplement 1
• Publication Date: 2018-09
• Subjects: Scleral lens -- Keratoconus -- Accommodation -- Contact lens -- Higher order aberrations; Contact lenses -- Periodicals; Intraocular lenses -- Periodicals; Orthokeratology -- Periodicals; Anterior segment (Eye) -- Diseases -- Periodicals; 617.7523
• DOI: 10.1097/ICL.0000000000000317
• Languages: English
• ISSNs: 1542-2321

Abstract

Abstract : Purpose: To evaluate the accommodative response to different accommodative stimulus and to determine the changes in ocular higher-order aberrations with accommodation in keratoconus patients fitted with mini scleral lenses. Material and Methods: The study included 15 keratoconus patients wearing mini scleral lenses (Misa Scleral Lens—Microlens, Arnhem, the Netherlands) and 15 keratoconus patients wearing rigid gas permeable lenses. Hartmannn Shack aberrometer (IRX-3; Imagine Eyes, Orsay, France) was used for the evaluation of accommodation. Accommodative responses to the accommodative stimulus ranging from 0.5 to 5.0 diopters (D) with intervals of 0.5 D were recorded. Spherical, coma, trefoil aberration, and root mean square (RMS) of total higher-order aberrations (HOAs, third to sixth orders) at baseline, at 2.5 D stimulus, and at 5 D stimulus were also recorded. Results: Although accommodative response to accommodative stimulus of 0.5 to 2.5 D (with 0.5 D intervals) was similar in both groups, accommodative response to accommodative stimulus of 3.0 to 5.0 D was significantly lower in keratoconus group wearing mini scleral lenses. The coma, spherical, trefoil aberrations, and the RMS of total HOAs at baseline, at 2.5 D stimulus, and at 5 D stimulus were not significantly different between the groups. However, changes in the coma and trefoil aberrations and RMS of total HOA with 2.5 D and 5.0 D stimulus were significant only in the RGP group. Conclusions: Accommodative response to increasing accommodative stimulus was found to be impaired in keratoconus patients wearing mini scleral lenses.