[Ophthalmological assessment of professionally significant functions in persons undergone laser myopia correction].

Professionally significant functions (visual acuity, color vision and its parameters, and dark adaptation and its parameters) were determined in moderate and severe myopia before and after its excimer laser correction by the LASIK method: in early (1, 3 months) and late (6, 12 months) periods after surgery to decide where the operated persons are allowed to have the jobs associated with railway traffic safety. Sixty-one patients with moderate and severe myopia and 23 control individuals were examined at the Moscow Research and Technological Complex "Eye Surgery". The examinations have demonstrated that the values of visual acuity, color vision, and dark adaptation considerably improved.

[Quantitative criteria for the evaluation of congenital chromatic vision disorders].

The minimum angular size of a color stimulus required for its discrimination has been ascertained to be a quantitative criterion for evaluating the form and degree of congenital chromatic visual diseases. Unlike individuals with normal color perception who distinguish all basic and intermediate colors despite their saturation, anomalous trichromats discriminate more saturated colors with larger angular sizes of stimuli than those with normal color perception. Mild and moderate anomalous trichromats do not discriminate lowly saturated colors or for this they require the angular sizes tens of times greater those for normal trichromats.

[Computer display color combinations and symbols that provide the optimum visual working capacity of an operator].

While working with displays, a combination of white and yellow objects against the black, dark grey, and blue backgrounds was found to be the best in visibility. When the objects were observed against the pale grey and green backgrounds of a display, eye functional changes were minimal, which causes the authors to recommend them as the optimum backgrounds. To reduce visual fatigability when a person works on a computer requires to alternate backgrounds by using white and yellow objects against the black and blue backgrounds for short-term emergency transmissions and green and pale grey backgrounds for presenting continuous current information.

[State of occupationally significant visual function in locomotive team personnel working in radioactive pollution areas].

Long exposure to small radio activity doses have no impact on the acuity of photopic and mesopic vision, on the resistance of eyes to glare, and on the rapidity of color differentiation, which remain to be at the high level that meets medical requirements for the professional abilities of locomotive workers.

[A comparative study of sun-protective glasses for locomotive team workers].

Solar flashes of 1500 to 9000 kd/m2 have been ascertained to have an adverse impact on the functional status of a visual analyzer. Comparing Russian and foreign sun-proof filters has indicated that a HC-9 neutral light-proof filter and a NIIOOIK film have the optimum light-protective properties, which may be recommended for use in the sun-proof glasses for locomotive workers.