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Application

2003134168/14, 2003-11-26

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Start date

2003-11-26

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Actual filing date

2003-11-26

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Published

2004-12-20

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Inventor

Doga A.V.Sugrobov V.A.Tjurin V.S.Makarov A.V.Kononenko A.A.Kishkin Ju.I.Semenova N.A.Vartapetov S.K.Golovanov V.Ju.

(73)

Holder

Gosudarstvennoe Uchrezhdenie Mezhotraslevoj Nauchno-Tekhnicheskij Kompleks Glaza" Im. Akad. S.N. Fedorova

SURGICAL METHOD FOR CORRECTING HYPERMETROPIC ASTIGMATISM Russian patent published in 2004 - IPC

Abstract RU 2242200 C1

FIELD: medicine.

SUBSTANCE: method involves treating eye cornea with ultraviolet pulsating laser radiation having Gauss energy density distribution over beam cross-section. Beam diaphragm is tuned on laser radiation ablation threshold to form round spot of 0.3-1.2 mm diameter and energy of 0.7-1.4 mJ per pulse, pulse duration of 4-7 ns and pulse succession frequency from 100 to 300 Hz. Cornea treatment is concentrated in scanning grid points arranged in equilateral triangles. Treatment points form flat irregular figure built with broken lines in each of symmetric segments turned with their arc-like sides to opposite sides. Symmetry axis transecting the treatment segments is directed so that it coincides the weak astigmatism axis. The scanning grid is shifted several times. The treatment is carried out on the following scanning grid having its points between those of the previous one.

EFFECT: enhanced effectiveness in obtaining uniform surface after treatment; shorter operation time.

3 dwg

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RU 2 242 200 C1

Authors

Doga A.V.

Sugrobov V.A.

Tjurin V.S.

Makarov A.V.

Kononenko A.A.

Kishkin Ju.I.

Semenova N.A.

Vartapetov S.K.

Golovanov V.Ju.

Dates

2004-12-20—Published

2003-11-26—Filed

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