Comparison between Topcon SL-45 and SL-45B with different correction methods for factors influencing Scheimpflug examination.
Topcon Tokyo manufactured the first series of SL-45 in 1980 and a second in 1982/83, which were completed in Bonn with all technical improvements developed so far. In 1987, the SL-45B was manufactured which included all previously added improvements. To compare both camera types, we carried out a test with 10 volunteers and the following technical variables for the SL-45: (1) miosis; (2) mydriasis; (3) flashbulb 1; (4) flashbulb 2; (5) film batch 1; (6) film batch 2, and (7) different types of film. Afterwards, 5 of these volunteers were photographed with the SL-45B. Photographer and reader were identical in all cases. Based on microdensitometry it could be demonstrated that, with the exception of a different film type, all variables can be compensated for by using the corneal peak as an external standard.
Laser
H
H
Department of Experimental Ophthalmology, University of Bonn, FRG.
Berndt
W
W
Leyendecker
M
M
Kojima
M
M
Hockwin
O
O
Cheyne
A
A
D000869:Anterior Eye Segment / Q000033:anatomy & histology*; D003315:Cornea / Q000033:anatomy & histology; D003720:Densitometry; D005069:Evaluation Studies as Topic; D006801:Humans; D010781:Photography / Q000295:instrumentation* / Q000379:methods; D011680:Pupil / Q000187:drug effects; D015203:Reproducibility of Results