This study of the effects of lenses of different colors on the visual abilities and comfort of 20 patients with retinal disease found that, in home trials, the critical issue was density more than color. Office tests of visual acuity and contrast sensitivity with colored lenses did not predict subjective benefit. (Author/JDD)

Some cautions regarding the early educational uses of optical aids with visually impaired children are suggested, based on widely held assumptions and recent findings in the fields of perception and reading. The change from the sight conservation era to one advocating the maximum use of remaining vision is traced. (Author/SW)