[Skip to Navigation]
Access to paid content on this site is currently suspended due to excessive activity being detected from your IP address Please contact the publisher to request reinstatement.
March 1993

Artificial Light and Early-Life Exposure in Age-Related Macular Degeneration and in Cataractogenic Phototoxicity

Author Affiliations

Baltimore, Md

Arch Ophthalmol. 1993;111(3):297-298. doi:10.1001/archopht.1993.01090030015002

To the Editor.  —Taylor et al1 report that visible light, particularly blue light (400 to 500 nm), may be a risk factor for age-related macular degeneration (ARMD) based on possible photo-oxidative stress, although no equivalent risk was found for UV-B (290 to 320 nm) or UV-A (320 to 400 nm) exposure. May I suggest that two variables explicitly excluded from this study may affect such risk, particularly in combination? One is "indoor exposure,"1 which I take to mean artificial light. Indoor and outdoor ambient illumination intensity levels derived from such sources as the ubiquitous fluorescent or mercury-vapor streetlight are typically 1.5 to 3 log units (ie, 30 to 1000 times) below outdoor daylight levels, although many illuminance standards in lighting have increased in intensity by a factor of 2 to 3 from what they were a generation ago. The stared-at phosphors of television and computer displays fall in