Eye

The study is facing to identify the mathematical-geometric bonds that concern the choice of the better strategy for the operations of refractive surgery.

Laser measurement
Laser measurement.

 
Laser test-rig
Test-rig of laser system.
Out-In test
Result of Out-In strategy applied on a specimen.

 
In-Out test
Result of In-Out strategy applied on a specimen.

The photorefractive keratectomy (PRK) uses an excimer laser to change the shape of the corneal surface. This will change the refractive characteristics of the eye, thus correcting problems related to myopia, astigmatism, hyperopia. The excimer laser uses a process of photochemical ablation that removes, with a high degree of precision, a layer of the corneal tissue.

The study focused on the strategy of ablation that can be done in sequence from the center of the cornea to the outside or vice versa. The research has led to consider as the best strategy for this type of surgical operation that starts the ablation by the outermost diameter, ending at the center.

References

  1. 1 A. Corba, B. Cozzi, G. Fumagalli, R. Viganò, Mathematical analysis of the multizone strategy for PRK, VISX ITALIAN USERS meeting '98 - Milano, 13 Giugno 1998
  2. 2 B. Cozzi, G. Fumagalli, C. Bianchi, R. Viganò, Una simulazione matematica della strategia multizonale per PRK, Viscochirurgia - Fabiano Editore srl - Cuneo, XII(3):73-81, 1998