FIELD: ophthalmology; protection and prophylactics of organs of vision against intensive radiation sources in natural light.
SUBSTANCE: proposed scanning screens for relaxation spectacles designed to provide for functional binding between eye refraction and diameter of screen holes and to ensure coverage of imaging space from near to distant points of vision have nontransparent perforated plates with through holes in the form of lines whose number grows from bottom upwards. Line number n and hole number N per raster line are given as 2n - 1 = N; hole diameter of line n d1 = 0.63 mm; d2 = 1.0 mm; d3 = 1.41 mm; d4 = 3.2 mm; hole-to-hole distance equals diameter of line n hole and line-to-line distance is not shorter than diameter of larger hole; scanning hole of diameter D = 10 - 12 mm is disposed on top above middle hole of fourth line at distance D; straight line drawn through central holes of all four lines and vertical axis form angle of 8 - 10 deg.
EFFECT: easy to use.
1 cl, 3 dwg
