Description of the accommodation state in patients with astigmatism before and after refractive surgery with Lasik technical

Abstract

<em><strong>Objective:</strong></em> To describe accommodative function in astigmatics who took Lasik refractive surgery. Methodos: 30 patients diagnosed with myopic astigmatism, hyperopic and mixed, candidates for Lasik, which amplitude of accommodation was assessed with the methods of Sheard and modified Donders, accommodation flexibility, lag of accommodation with Nott dynamic retinoscopy, positive relative accommodation and negative relative accommodation, measure of the refractive data through static and dynamic refraction before and after surgery. These measurements were performed before surgery refractive optical correction and a month thereafter with new refractive conditions. Were considered as inclusion criteria: astigmatism greater than 0.75 and those for the refractive surgery procedure and any pre surgical accommodative state. Within the exclusion criteria were considered patients with severe ocular and/or systemic pathologies, no cognitive or mental depress, no permanent strabismus diagnosis, contraindications for refractive surgery, myopia, hyperopia and presbyopic before the refractive surgery. <em><strong>Results:</strong></em> Neither variable corresponding to the accommodative state components do not show discrepancies between the pre and post. By comparing the amplitude of accommodation with the reference values given by Donders, Duane and Hofstteter, it appears that there was statistical difference and Duane Hofstetter (p ≤ 0.05), clinically, the difference was relevant towards Duane (1.86D), and Donders minor. The most common accommodative impairment after refractive surgery was excessive accommodation by 13% (4 / 30) of patients, given that the dates did not change between the time before and after surgery and 10% (3 / 30) had no obvious pre accommodative inertia surgically. Conclusions: accommodative components are not affected by the performance of Lasik refractive surgery. The normal values handled by Duane, are clinical differences with those of Hofstetter and Donders.