[Visual function requirements in modern aviation]

The authors describe aviation ophthalmology as a typical ergoophthalmic discipline as regards the sphere of interest as well as with regard to its preventive trend. The visual analyzer is a very exposed sense which can be modified by some dynamic effects of flight to such an extent that they may restrict the pilot's activities and consequently also the safety of the flight. Specific factors of flight which comprise also aerogenic hypoxia, hypobarism, overloading, vibrations and the consequences of impaired relations of the different senses may be manifested by changes of the perception of light, colour, visual acuity, perception of contrasts of the visual field etc. The most modern aviation technique puts some so far unusual demands on vision tested by means of complicated psychophysiological tests. Only the future will show which tests should be included among routine methods of aviation ophthalmology and which tests will be restricted only to experimental work.