COLOR-VISION THROUGH INTRAOCULAR-LENS

Fifty patients aged from 30 to 69 years (mean 54.7 +/- 11.3 years, SD) with a UV-protected monofocal polymethylmethacrylate intraocular lens (IOL) were examined with the Farnsworth-Munsell 100 hue (FM 100) test and the Color Vision Meter 712 anomaloscope, The spectral transmissio n of the same kind of IOLs as was used surgically was measured with La mbda 2 UV/VIS Spectrometer, In the FM 100 test, there was no significa nt difference between the results of the IOL eyes and normal eyes, How ever, the IOL eyes showed better error scores than the normal eyes in the blue-purple box IV in the FM 100 test, In the anomaloscope testing , the Rayleigh (red-green) equation showed no differences between the IOL patients and controls, In the Moreland (blue) equation, however, t he mid matching point was significantly shifted towards more green (me aning better blue colour sensitivity) in the IOL eyes than in the cont rol eyes, This is due to the spectral transmission of the IOLs which s howed 80-90% transmission already starting at the wavelength of about 420 nm, In comparison, the transmission of the normal human lens reach es those percentages near 500 nm or even further at advanced age.