Modification of colour vision in the green/red axis in acute and chronic hypoxia explored with a portable anomaloscope.

The effects of acute (4350 m), subacute (4800 m) and chronic (4800 m) altitude hypoxia on colour vision in the green/red axis were explored in eight sea-level natives by means of a simple portable anomaloscope. Subjects were required to create a yellow colour from a mixture of red (635 nm) and green (565 nm) obtained from two electroluminescent diodes. A relative decrease in green, compared to red, sensitivity was observed in each hypoxic condition (p less than 0.

[Ocular electrophysiology and synthetic antimalarial agents (author's transl)].

Ocular electrophysiology investigations are essential for detecting retinal complications of prolonged treatment with synthetic antimalarial agents. The techniques employed and the principal lesions discovered by the examination are described. The analysis of lesions found in 29 out of 120 cases examined showed that only simple close surveillance was necessary in 17 cases, a reduction in daily dosage in 11 cases, and interruption of treatment in one case only.