RT Journal Article
SR Electronic
T1 Measurement of stray light and glare: comparison of Nyktotest, Mesotest, stray light meter, and computer implemented stray light meter
JF British Journal of Ophthalmology
JO Br J Ophthalmol
FD BMJ Publishing Group Ltd.
SP 345
OP 351
DO 10.1136/bjo.2004.044990
VO 89
IS 3
A1 L J van Rijn
A1 C Nischler
A1 D Gamer
A1 L Franssen
A1 G de Wit
A1 R Kaper
A1 D Vonhoff
A1 G Grabner
A1 H Wilhelm
A1 H J Völker-Dieben
A1 T J T P van den Berg
YR 2005
UL http://bjo.bmj.com/content/89/3/345.abstract
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.