The correlation between various types of intraocular lens and laser wavelength.
OBJECTIVE
To analyze effects of the composition and the color of intraocular lenses (IOLs) on laser wavelength.


METHODS
A case control study.


METHODS
Laser light rays at wavelengths ranging from 0.1 to 0.5 W were directed at a polymethymethacrylate ocular model fitted consecutively with three types of IOLs at various refractive powers. A laser detector was placed on the model beneath the lenses. The laser beam was passed through the IOLs and the output measured by a sensor. Attenuation rate was calculated.


RESULTS
The colored IOL caused significantly more attenuation than did the noncolored IOLs (p <.01). A 30-diopter colored IOL showed an attenuation rate of up to 15% at a wavelength of 488 + 514 nm.


CONCLUSIONS
Consideration of the wavelength and the output of a laser for a particular IOL is required when laser photocoagulation of the retina is performed in patients with pseudophakia.
Kawai
Kenji
K
Department of Ophthalmology, Tokai University School of Medicine, Isehara, Japan. k-kawai@is.icc.u-tokai.ac.jp
Sakanishi
Kotaro
K
D003116:Color; D017075:Laser Coagulation / Q000379:methods*; D007910:Lenses, Intraocular; D008953:Models, Anatomic; D019904:Polymethyl Methacrylate; D019591:Pseudophakia / Q000150:complications; D012164:Retinal Diseases / Q000601:surgery
D019904:Polymethyl Methacrylate