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Stability of femtosecond laser-created clear corneal incisions (experimental study)

Poster Details

First Author: Y.Nizametdinova RUSSIA

Co Author(s):    K. Khripun   Y. Takhtaev   S. Shukhaev              

Abstract Details


To compare the femtosecond laser created - clear corneal incisions (CCI) with different profile and tunnel length on porcine eyes.


S.N. Fyodorov�â�€�™s Eye Microsurgery Complex, Saint-Petersburg, Russia. Saint- Petersburgs Multi-field Hospital �â�„�– 2, Russia.


The Seidel test of wound leakage performed in 35 porcine eyes to evaluate stability of CCIs created with femtosecond laser �Â�«Victus�Â�». The width 2400 �Î�¼m of incisions was the same in all cases. In single-plane group (10 samples) 3 eyes have got 1250 �Î�¼m incision tunnel length, 3 eyes 1580 �Î�¼m and 4 eyes 1800 �Î�¼m; in two-plane group (12 samples) - 4 eyes 1225 �Î�¼m, 4eyes 1582 �Î�¼m and 4eyes 1797�Î�¼m; in three- plane group(13 samples) - 4 eyes 1240 �Î�¼m, 5 eyes 1552 �Î�¼m and 4 eyes 1786 �Î�¼m. Ophthalmodynamometer was used to simulate compression effect (10-60g).


The obtained results show that increasing the length and profile of the tunnel improves its tightness properties. The three-plane incisions with a length of 1552 and 1786 �Î�¼m showed a better stability to self-seal. Single-plane tunnel incisions are less stable in comparison with multi-plane. In single-plane group CCIs with maximum length 1800 �Î�¼m were characterized by reliable tightness.


Results indicate that the two- and three- plane CCIs with tunnel length 1500-�Î�¼m (1.5 mm) or more provide advantageous architecture for reliable self-sealing. Femtosecond laser is a promising direction to create precise parameters of the cut.

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