Characterizing reflections from intraocular lens implants.
OBJECTIVE
To develop a test method for characterizing glare from intraocular lenses (IOLs) and to confirm a clinical finding that the haptic insertion in the optic of a three-piece IOL produces extraneous line images.


METHODS
The method consists of directing a collimated Gaussian laser beam to various parts of the IOL to be tested in a water-filled model eye. Reflected images produced in the retinal plane are photographed with a digital camera.


RESULTS
A test method was developed to characterize the source of glare images from IOLs. The test method developed was used to confirm a clinical finding that the haptic insertion in the optic of a three-piece IOL produces extraneous line images.


CONCLUSIONS
The method developed can be used to characterize and pin point the source of extraneous glare images from intraocular lens implants. The haptic insertion in the optic of a three-piece IOL has been identified as a source of line images.
Landry
R J
RJ
Division of Physics, Center for Devices and Radiological Health, FDA, Rockville, MD 20850, USA. robert.landry@fda.hhs.gov
Ilev
I K
IK
Pfefer
T J
TJ
Wolffe
M
M
Alpar
J J
JJ
D005260:Female; D019466:Glare; D006801:Humans; D053685:Laser Therapy / Q000379:methods; D019654:Lens Implantation, Intraocular / Q000009:adverse effects* / Q000379:methods; D007910:Lenses, Intraocular / Q000009:adverse effects*; D008297:Male; D008954:Models, Biological; D012029:Refraction, Ocular