ánh sáng và gần 507 nm hơn AcrySof IOL tự nhiên và, do đó, bệnh nhân cấy ghép với AcrySof IOL tự nhiên nên đã nâng cao tầm nhìn scotopic. Nó sẽ được phản trực giác để tin rằng tầm nhìn scotopic sẽ bị giảm đi | 8 Intraocular Lenses to Restore and Preserve Vision Following Cataract Surgery 1 light at and near 507 nm than the AcrySof Natural IOL and therefore patients implanted with the AcrySof Natural IOL should have enhanced scotopic vision. It would be counterintuitive to believe that scotopic vision would be diminished instead of enhanced Fig. . A recent study presented at the ASCRS Annual Meeting in 2005 evaluated detection thresholds for a Goldmann size V target at wavelengths of 410 nm 450 nm and 500 nm using a modified Humphrey Field Analyzer in patients with and without yellow clips that approximated the filtering ability of the AcrySof Natural IOL 10 . Each test was carried out with a single wavelength of light present. The results showed a decreased ability to perceive objects when only 410 nm or 450 nm light was present but no significant 400 500 800 700 WAVELENGTH nm Fig. Spectral light distribution in air under mesopic M and scotopic S conditions 20 decrease in perception ability at 500 nm. This decrease was more significant in patients with ARMD. The results are exactly what would be expected based on the light transmission spectrum of these IOLs. However the study fails to provide insight into mesopic or scotopic vision as it does not represent mesopic or scotopic conditions. In all real-life environments there is always a spectrum of light present not just one wavelength. This is also true of mesopic and scotopic conditions where there is more 500 nm and longer wavelength light than 410 nm or 450 nm wavelength light Fig. . Summary for the Clinician Clinical studies demonstrate no difference between colorless UV-blocking IOLs and blue light-filtering IOLs in terms of visual acuity contrast sensitivity color vision or night vision. Clinical Experience Having implanted several thousand AcrySof Natural IOLs I have had the opportunity to gain insight into the quality of vision provided by this unique IOL. The visual results in my patients have .
