PT  - JOURNAL ARTICLE
AU  - L J van Rijn
AU  - C Nischler
AU  - D Gamer
AU  - L Franssen
AU  - G de Wit
AU  - R Kaper
AU  - D Vonhoff
AU  - G Grabner
AU  - H Wilhelm
AU  - H J Völker-Dieben
AU  - T J T P van den Berg
TI  - Measurement of stray light and glare: comparison of Nyktotest, Mesotest, stray light meter, and computer implemented stray light meter
AID  - 10.1136/bjo.2004.044990
DP  - 2005 Mar 01
TA  - British Journal of Ophthalmology
PG  - 345--351
VI  - 89
IP  - 3
4099  - http://bjo.bmj.com/content/89/3/345.short
4100  - http://bjo.bmj.com/content/89/3/345.full
SO  - Br J Ophthalmol2005 Mar 01; 89
AB  - Aim: To evaluate the properties of devices for measuring stray light and glare: the Nyktotest, Mesotest, “conventional” stray light meter and a new, computer implemented version of the stray light meter. Methods: 112 subjects, divided in three groups: (1) young subjects without any eye disease; (2) elderly subjects without any eye disease, and (3) subjects with (early) cataract in at least one eye. All subjects underwent a battery of glare and stray light tests, measurement of visual acuity, contrast sensitivity, refraction, and LOCS III cataract classification. Subjects answered a questionnaire on perceived disability during driving. Results: Repeatability values were similar for all glare/stray light tests. Validity (correlation with LOCS III and questionnaire scores), discriminative ability (ability to discriminate between the three groups), and added value (to measurement of visual acuity and contrast sensitivity) were all superior for both stray light meters. Results of successive measurements are interrelated for the conventional but not the new stray light meter. This indicates a better resistance to fraud for the latter device. Conclusions: The new computer implemented stray light meter is the most promising device for future stray light measurements.