Ein neues straylightmeter im klinischen test

Background: Beside testing of visual acuity and visual field, the measurement of straylight and glare is important for testing of drivers. Over the past years, many glare testers have been developed. Most of these measure either visual acuity or contrast sensitivity in the presence of a glare source. The aim of this study was to evaluate a new computer implemented straylight meter in regard to repeatability, validity and discriminative ability, and to compare the results with those of other devices currently used for measuring straylight and glare. Patients and methods: In the three participating European clinics a total of 112 subjects has been recruited and divided into 3 groups: Young subjects (20 to 40 years of age) without any eye disease, elderly subjects (over 50 years) without any eye disease and elderly subjects (over 50 years) with a cataract in at least one eye. All subjects underwent a battery of glare and straylight tests, measurement of visual acuity, contrast sensitivity, refraction and LOCS III cataract classification. Results: Repeatability, validy and discriminative ability were all superior for both straylight meters. Conclusion: Due to the best test results and the advantages over the conventional, the new computer implemented straylight meter is currently the best method for measuring intraocular straylight that mainly affects glare and contrast sensitivity.