SciELO - Scientific Electronic Library Online

 
vol.72 issue2Safety and efficacy of intraoperative 5-fluorouracil infiltration in pterygium treatmentDiscarded corneas due to positive donor's serologic test in the Hospital São Paulo Eye Bank: a two-year study author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Arquivos Brasileiros de Oftalmologia

Print version ISSN 0004-2749On-line version ISSN 1678-2925

Abstract

MATOS, Luciana de  and  CARVALHO, Luis Alberto Vieira de. Preliminary results of an algorithm for customized soft contact lens ablation. Arq. Bras. Oftalmol. [online]. 2009, vol.72, n.2, pp.174-179. ISSN 1678-2925.  http://dx.doi.org/10.1590/S0004-27492009000200008.

PURPOSE: To develop a computer simulation for customized soft contact lenses in order to correct aberrations of higher order. METHODS: Using real data from a patient diagnosed with keratoconus, which were measured using a Hartmann-Shack wavefront sensor, the thickness of the contact lenses that compensate these aberrations as well the numbers of pulses required to ablate the lenses were specifically determined for the patient. RESULTS: The maps of correction are presented and the numbers of pulses are calculated, using a 0.5 mm beam width and a 0.3 µm ablation depth. CONCLUSIONS: The results shown here are promising, but they should be improved so that the ablation in actual physical systems can reach the desired accuracy.

Keywords : Algorithms; Computer simulation; Cornea [pathology]; Keratoconus; Photorefractive keratectomy [methods]; Contact lenses, hydrophilic; Models, theoretical; Refractive surgical procedures; Image enhancement; Image interpretation, computer-assisted.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License