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At least 1,513 records · Page 84Linked to original sources
PubMed2005

Evaluation of a clinical aberrometer for lower-order accuracy and repeatability, higher-order repeatability, and instrument myopia.

BACKGROUND: Refractive surgery has stimulated the development of aberrometers, which are instruments that measure higher-order aberrations. The purpose of this study was to test one clinical aberrometer, the Complete Ophthalmic Analysis System (COAS), for its accuracy, repeatability, and instrument myopia for measuring sphere and astigmatism and its repeatability for measuring higher-order aberrations. METHODS: Aberrations of 56 normal eyes (28 subjects) were measured with and without cycloplegia using a COAS, a conventional autorefractor and by subjective refraction. We evaluated lower-order accuracy (sphere and astigmatism) of the COAS and autorefractor by comparing that data with that of subjective refraction. We also tested COAS lower- and higher-order repeatability for 5 measurements taken in less than 1 minute. We evaluated instrument myopia by comparing cycloplegic and noncycloplegic measurements of the same eye. Data were analyzed for a 5.0-mm-diameter pupil. RESULTS: Mean COAS spherical error was between -0.1 and +0.4 diopters (D), depending on cycloplegia and the kind of sphere power computation selected. Cylinder power errors were less than 0.1 D. COAS repeatability coefficients were better than 0.25 D, and instrument myopia was less than 0.4 D. These were comparable with those of autorefraction. Higher-order repeatability was sufficient to allow reliable measurement of normal third-order aberrations and spherical aberration. CONCLUSIONS: Accuracy, repeatability, and instrument myopia of the COAS are similar to those of a conventional autorefractor. Accuracy and repeatability are also similar to those of subjective refraction. Like an autorefractor, the COAS provides instantaneous, objective measurements of sphere and astigmatism, but it also measures higher-order aberrations. We found that it is capable of reliably measuring problematic higher-order aberrations and is therefore a valuable asset for modern clinical eye care.

Adult↗
PubMed2005

Communicating the ocular and systemic complications of obesity to patients.

BACKGROUND: Obesity has become a growing worldwide epidemic that is associated with serious medical complications. Many clinicians and patients are aware of the systemic complications of obesity, but there are few providers and patients who are aware of the ocular manifestations of obesity. METHODS: A review of the current medical literature was performed. Ocular and systemic manifestations associated with obesity are described, and a methodology for educating the optometric patient is presented. RESULTS: There is significant morbidity and mortality associated with obesity, which is causing serious consequences to patients and an enormous economic strain on the health care system. Optometrists have a tremendous opportunity and obligation to educate their patients on the potential sight-threatening complications of obesity and encourage them to decrease their caloric intake and increase their physical activity to help alleviate this individual and collective burden. CONCLUSIONS: Optometrists have a duty to educate and counsel their overweight and obese patients on the devastating ocular complications that could manifest as a result of obesity.

Eye Diseases↗
PubMed2005

Contemporary issues in amblyopia treatment.

PURPOSE: The aim of this report is to review the contemporary research in amblyopia treatment and how it will affect clinical practice patterns. METHODS: Topics addressed include prescribing the optimal refractive correction, the most effective treatment, duration and intensity of treatment, regression after treatment, the upper age for treatment, and the chance of the amblyope losing his or her sound eye. RESULTS AND CONCLUSIONS: The optimal refractive correction is best determined with cycloplegic retinoscopy; pharmacologic penalization can be as effective as patching in children with moderate amblyopia; less-intense treatment regimens have been found to be as effective as more-intense treatment regimens; regression can occur in as many as 25% of all treated patients; some older amblyopes can be treated successfully; and the amblyope has a higher chance of becoming blind than the nonamblyope.

Amblyopia↗