Spectral filters were used for additional correction of vision in 67 patients: in 15 adults with initial cataracts (intensive yellow filter), 26 children with albinism (yellow-brown filter), 14 children with macular hypoplasia (orange filter), and 12 children with aphakia after removal of congenital cataracts (yellow filter). Selection of the filter density is carried out using a special method including visocontrastometry, examination of sensitivity to lateral light, and study of color perception thresholds. Use of filters resulted in improvement of the vision acuity by 43.5% in patients with initial cataracts, by 10% in those with albinism, by 20% in those with macular hypoplasia, and by 22% in those with aphakia; moreover, an improvement of the frequency-contrast characteristics was observed, as well as a reduction of photophobia, and a reduction of vision amplitude in patients with nystagmus. The possible applications of spectral correction are discussed.

Adult↗

PubMedDate not supplied

[Improved modification of "Vitreotome" tip for intraocular surgeries].

An improved designed of the tip of the ABO-I vitreotome manufactured at the Russian plants has been proposed. The modification consists in that the tip combines irrigation and aspiration systems, as well as the rate of irrigative solution infusion can be controlled. The clinical trials of the improved modification of the vitreotome tip have indicated that it is easy-to-use and minimizes surgical and hydraulic injuries to the ocular tunica and structures.

Equipment Design↗

PubMedDate not supplied

[An instrument for ophthalmologic surgical measurements].

Intensively improving the techniques of eye microsurgery presents higher requirements for the accuracy of intraoperative measurements of the eyeball and accessory ocular apparatus. A unit has been proposed for intraoperative ophthalmosurgical measurements, which will increase measurement accuracy up to 0.1 mm, which is beyond the reach of the conventional units.

Anthropometry↗