Effects of Corneal Scars and Their Treatment With Rigid Contact Lenses on Quality of Vision.

Objectives: To study the effects of corneal scars and the treatment of these scars with rigid gas-permeable (RGP) contact lenses on quality of vision including straylight. Visual effects were related to scar characteristics such as size and grade.

Methods: Straylight and best-corrected visual acuity were measured in 23 patients with corneal scars during and after RGP contact lens wear.

Increased Straylight in Patients With Keratoconjunctivitis Sicca.

Purpose: (1) To qualify complaints of quality of vision in patients with (severe) keratoconjunctivitis sicca by examining straylight values and (2) to check for an effect of scleral lens wear on straylight.

Methods: Straylight was measured in 16 patients with severe keratoconjunctivitis sicca using the Oculus C-Quant. In 9 of these patients, scleral lenses were used, and straylight was measured with and without scleral lenses.

Ocular straylight in albinism.

Purpose: Albinism is an inherited disorder that affects the melanin biosynthesis pathway, which results in reduced or absent pigment formation. This may lead to increased light transmission through the iris and more reflected light from the fundus. Both these effects contribute to the occurrence of ocular straylight.

Straylight measurements in contact lens wear.

Purpose: (1) To quantify the effect of contact lens wear on straylight in rigid and soft contact lens wearers and (2) to relate findings to morphological changes and subjective complaints.

Methods: Straylight was measured using the Oculus C-Quant during contact lens wear and after contact lens removal in 30 rigid contact lens wearers and 30 soft contact lens wearers. Semi-quantitative (0-4) slit-lamp grading of anterior segment changes using Efron grading scales and contact lens characteristics were performed.