Oct 9 2007
A study to evaluate safety, predictability and efficacy of aspheric-based eye treatments using laser technology showed a significant increase in visual acuity among other results.
The study was conducted by Dr Maria Clara Arbelaez, medical director of Muscat Eye Laser Centre in collaboration with Professor Pavel Rozsival; Dr Alena Feuermannova, Czech Republic; and Dr Rainer Wiltfang of Germany.
The study was to evaluate aspheric-based treatments with the Schwind Esiris excimer laser and the Ork-Cam software module regarding safety, predictability and efficacy.
"These are the most important results of a recent international multi-centre Lasik study with 183 eyes which I conducted with the three international opthalmologists," Dr Maria stated said here.
The study has been published in the most recent issue of Ophthalmology International under the section industry news stating that the study showed a very high predictability of treatment results with a significant increase in visual acuity and no induction of aberrations, that could reduce quality of vision or contrast sensitivity.
Dr Maria revealed that in all eyes, the Schwind "aberration-free treatment was employed", which leaves pre-operative higher order aberrations unchanged in order to allow patients to retain a habitual sight impression.
The flaps were created in all cases with the Carriazo-Pendular microkeratome (superior hinge).
The results revealed that in 71 per cent of all treated eyes, the planned refractive result was achieved with a minimum deviation of ¡Ó0.25D; 91 per cent were in the area of ¡Ó0.5D and 100 per cent of the eyes achieved ¡Ó1D.
The post-operative vision without aids compared to the pre-operative vision with glasses or contact lenses also increased significantly.
Six months after treatment, 86 per cent of all eyes achieved a post-operative uncorrected visual acuity (BCVA) of 20/20 or better.
The study also showed that, with the help of the Ork-Cam, biomechanical changes of the cornea are effectively compensated.
After six months, no growth of significant aberrations, such as coma or spherical aberration was observed, nor was any additional higher-order aberrations induced on an average.
The high precision of the results is also documented through the extremely small re-treatment rate, which was less than two per cent.