CHILDREN WITH DEFECTIVE VISION

Protection of employees with defective vision.

An employer has a special duty towards a one-eyed man (Paris v. Stepney Borough Council, I95i) but *does not have a special duty to a man with normal sight because employment could normally continue with good monocular vision. Clearly, a man with very defective vision in one eye needs the same consideration as a one-eyed man so we examined the level of visual acuity which should alert the emplo...

Defective Children

Mentally Defective Children with Additional Handicaps

a special teacher was engaged for them on three afternoons a week for a period of three months. The group consisted of five children with cerebral palsy (two from rhesus incompatibility) of whom three had gross deafness and no speech, one had no deafness but very little speech, which was of poor quality and almost unintelligible; the fifth was normal in hearing and had some speech but could not...

Binocular luminance summation in humans with defective binocular vision.

Subjects with no functional binocularity (no stereopsis and no peripheral fusion) show much less binocular summation of the pupillary response (about 12%) than normal subjects (29%). However, summation is occasionally quite high in clinically stereoblind subjects. The reasons could be the simultaneous use of nonoverlapping fields of the two eyes in large-angle exotropes, peripheral fusion (comm...

Flicker photometry with chromatic adaptation and defective color vision.

When we alternate red and green stimuli at a certain frequency, we observe a flicker­ ing field. By adjusting luminances of both stimuli, we can minimize the flicker percep­ tion. This is the principle of the flicker pho­ tometry. When we apply the method to color defects, both subjects who are protanomal and those who are protanopic show a defi­ nitely different adjustment of two lumi­ nances ...