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PubMed1983

Microcomputer produced anaglyphs for evaluation and therapy of binocular anomalies.

An Atari 800 microprocessor with a color television monitor was used to produce red-green anaglyphs. These computer produced anaglyphs allow for rapid manipulation of vergence stimuli which allow the doctor greater control in diagnosis and therapy of binocular anomalies. Additionally, computer controlled stimuli allow for animation, and delivery of reinforcing aspects. The present paper describes a system in use.

Computers↗
PubMed1983

Convergence amplitude insufficiency.

There is a frequently overlooked group of patients, usually under 20 years of age, with typical symptoms of convergence insufficiency and diminished convergence amplitudes, but with normal near point of convergence. We studied ten cases of this type, which we call convergence amplitude insufficiency. The diagnosis in such patients will not be missed if convergence amplitudes are measured on every patient complaining of asthenopic symptoms during close work.

Accommodation, Ocular↗
PubMed1983

[Development and training of monocular motor control].

Misalignment of the visual axes of the eyes observed in strabismus may result from sensory, motor, and/or central nervous system disorders. The functional properties of a technique designed to increase, through training, the monocular motor control of normal human subjects was evaluated, the ultimate goal being obviously to apply the technique to cases of minor strabismus. The subject is seated in front of a television screen. A diaphragm extending from the subject's head to the screen divides the picture into two visually separated half fields. A micro-computer was programmed to project two patterns on the screen, made up of vertical green and grey bars (spatial frequency, 3 deg.). Displacement of the two visually superposable half fields could be independently achieved. The subject's task was to fixate, with one eye, the corresponding half field maintained stationary and track, with the other eye, the motion of the second half field. Perfect fusion of the two half fields has to be preserved during movements of the mobile half field over 2 to 6 degrees at a frequency of 0.4 Hz. The results show that after a few training sessions, subjects developed a high gain monocular motor control. This observation suggests that the method may be used as therapy to correct minor strabismus with or without anomalous retinal correspondence, and offers the possibility to study static and dynamic characteristics of Panum's areas and particularly their modifications as a function of training of monocular motor control.

Adolescent↗
PubMed1983

[Javal's mirror].

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Depth Perception↗