Objective: To investigate the correlation between phenol red test and Schirmer tear test on tear quantification together with a questionnaire to detect symptoms of dry eye. Methods: A total of 49 patients were enrolled at this study. Each participant had its eyes examined by the two tests.The dry eye symptoms were evaluated by a total of 5 questions.The data were collected and analysed by Kappa statistical method to check the concordance between the tests. Results: A sum of 65.3% of […]

OBJECTIVE: The objective of this study is to evaluate the cost of the use of lubricant eye drops, which are more used in the national market and contain in its formulation the same active ingredient – carboximeticelulose -, by considering their total number of drops in each flask. METHODS: An experimental study was accomplished by using three flasks of each one of the following eye drops: Lacrifilm®(eye drop 1) and Fresh Tears®(eye drop 2). To the analysis of their cost, […]

Purpose: To compare the ultrasound biometry measurements between immersion and contact techniques. Methods: The biometry was made in 60 eyes by the same examiner, using the contact and immersion techniques in each eye. Results: The lower mean axial length (23,16 mm) was found in the contact technique, and the greater (23,29) was found in the immersion technique, using the same probe. The lower mean standard deviation between recurrent measures in the same eye was found in the immersion technique, and […]

PURPOSE: This is to study the progressive addition lens (PAL) under the physiological optics’ view, to show the lensometer findings and its applicability to daily work. METHODS: At first, the aa., explains the ways to examine the PAL , and then indicates the physical basis applied to study the prismatic system of the concave and convex lens. It then examines the differences on progression zone extension and explains its diagonal position. Thirteen pairs of lenses from the same manufacturer were […]