Purpose. To evaluate the long-term efficacy, accuracy, stability, and safety of hyperopic laser in situ keratomileusis (LASIK) using a 213 nm wavelength solid-state laser. Methods. This prospective noncomparative case series consisted of 34 eyes of 17 patients which underwent hyperopic LASIK using a 213 nm solid-state laser (Pulzar Z1, CustomVis) at an outpatient refractive surgery center in Ma...

PURPOSE To model the possible impact of using average-power intraocular lenses (IOLs) and evaluate the postoperative refractive error in patients having cataract surgery in rural China. SETTING Rural Guangdong, China. METHODS Patients having cataract surgery by local surgeons were examined and visual function was assessed 10 to 14 months after surgery. Subjective refraction at near and dist...

PURPOSE To report calculated crystalline lens power and describe the distribution of ocular biometry and its association with refractive error in older Chinese adults. METHODS Random clustering sampling was used to identify adults aged 50 years and above in Xuhui and Baoshan districts of Shanghai. Refraction was determined by subjective refraction that achieved the best corrected vision based...

To the Editor: For some time we have used a clinical visual acuity test (subjective refraction) only for monocular testing. However, we believe that visual acuity measurements need to be performed under binocular open-view conditions as close to natural viewing conditions as possible. Subjective refractions without cycloplegia were examined with the Occlupad (Japan Focus Co., Ltd., Tokyo, Japan...

The purpose of this work was to find plausible predictors among optical parameters that may explain the inter-individual differences in subjective amplitude of accommodation not explained by age. An exploratory multivariable regression analysis was carried out retrospectively on a dataset with 180 eyes from 97 subjects (ages ranged from 20 to 58years). Subjective amplitudes of accommodation wer...

Longitudinal chromatic aberration (LCA) of the human eye has been studied repeatedly, but only at the fovea. Poor visual acuity prevents its subjective determination beyond a few degrees eccentricity. Consequently, we have used an objective approach, similar to that of Charman and Jennings [(1976). Vision Research 16, 999-1005], to measure ocular LCA across the visual field. To determine the va...

PURPOSE To compare which parameter category (wavefront data, psychophysical data, or subjective symptoms) predicts best subjective quality of vision after LASIK. METHODS Twenty-eight eyes (15 patients) were included. Twenty-three eyes (12 patients) underwent uneventful LASIK; 5 eyes (3 patients) were symptomatic eyes treated with myopic LASIK elsewhere. Mean preoperative spherical equivalent ...

Refractive error is the most common eye disorder and key cause behind correctable visual impairment, responsible for nearly 80% of impairment in US. can be diagnosed using multiple methods, including subjective refraction, retinoscopy, autorefractors. Although refraction gold standard, it requires cooperation from patient hence not suitable infants, young children, developmentally delayed adult...