Our eyes are similar to fingerprints: they have their individual shape with their own characteristics. Customized treatment by aberrometry uses a software allowing treating optic aberrations specific to each eye.
The purpose is to enhance quality of vision better than glasses, lens or conventional treatment.
Until 2002, existing diagnostic instruments could detect myopia, hyperopia and astigmatism. They represent 90% of all refractive errors. Higher order aberrations represent the last 10%.
Aberrometers are new instruments able to measure and treat these higher order aberrations in a personal way specific to each patient.
Front Wave Analysis:
Deze techniek werd oorspronkelijk ontwikkeld door de astrofysica en wordt nu aangewend bij de behandeling van refractiestoornissen.
Higher order aberrations are measured by the analysis of the reflected image through an optic grid.
- The wave front diagnosis performed with a non-contact instrument that studies the whole optic system of the eye from the retina to the cornea.
- La mesure des aberrations est combinée à l’analyse de la topographie cornéenne antérieure et postérieure, par une carte topographique
- Les paramètres mesurés par l’Aberromètre et le topographe, sont combinés sur une disquette qui permet le traitement assisté par ordinateur des anomalies conventionnelles (myopie, astigmatisme) et des aberrations optiques d’ordre supérieur, lors d’une procédure PRK, TRANS PRK or Lasik surgery.
- Advantages of a customized treatment by aberrometry are:
- - Customized treatment according to aberrations for each eye.
- - Enhancement of the best postoperative visual acuity sometimes up to more than 100%.
- Enhancement of night and sometimes day quality of vision compared to conventional treatment.
- Fewer risk of decrease of best corrected visual acuity.
- - Better visual stability and fewer risk of re-treatment.
- Ability to treat severe ametropia not treatable until now by classic techniques, even with a moderate corneal thickness or a large pupil diameter at night.
- Possibility of correction by retreatment of patients previously operated by refractive surgery with irregular astigmatism, a small optical zone... leading to nocturnal visual disorders: halos, glare by light...
Il est important de noter que le traitement par aberrométrie sera essentiellement indiqué chez les patients qui auront, selon les résultats préopératoires des aberrations significatives ou un large diamètre pupillaire à la pénombre et un profil favorable préconisant un résultat meilleur qu’avec la technique conventionnelle, ou en cas de retraitement.
Le Laser Excimer is used in various refractive surgery techniques: