Adult emmetropes and myopes were tested with the Catford drum and the results compared with subjective (Landolt C) acuity. For he emmetropes the Catford drum was found to overestimate visual acuity by a factor of approximately 4. For myopes, and emmetropes viewing through plus lenses, the discrepancies were much larger. Since the Catford drum not only overestimates acuity but will do so by a fa...

PurposeThis work set out to investigate if there was an association between subjective comfort and both measured vision during the use of contemporary daily disposable soft toric contact lenses.MethodsThirty-eight habitual lens wearers wore each three lenses for one week in a prospective, crossover, randomised, single-masked study. The following clinical measures were recorded at dispensing fol...

purpose : to evaluate the biomechanical changes of cornea after intracorneal ring segment (icrs) implantation in keratoconic eyes methods : in this study, 1 or 2 icrs were inserted in 17 keratoconic eyes. best spectacle-corrected visual acuity (bscva), uncorrected visual acuity (ucva), refraction, and keratometry were evaluated preoperatively and 1 and 3 months after surgery. corneal hysteresis...

PURPOSE To evaluate the clinical outcomes of cataract surgery using novel diffractive trifocal intraocular lenses (IOLs) in Koreans. METHODS This was a retrospective, consecutive, interventional study of cataract surgery using POD FineVision IOL implantation. Complete ophthalmologic examinations were performed preoperatively and postoperatively. Defocus curves were assessed over a range of +1...

Clinical relevance While the clinical focus of performance metrics is traditionally based on visual acuity, research from field impairment has demonstrated that such as reading speed and critical print size correlate much more strongly with subjective patient reported outcomes assessed ability in real‐world tasks.Background More recently, digital device use increasingly replaced many paper‐base...

We describe the electrophysiological findings on visual pathway examination in a 54-year-old female patient who suffered loss of acuity without cause clinical examination. The picture followed case Severe Pneumonia Secondary to Coronavirus 2 (SARS-CoV-2) infection that required admission Intensive Care Unit (ICU) for High-Flow Nasal Oxygen Therapy (HFO).

IMPORTANCE Visual acuity is the most frequently performed measure of visual function in clinical practice and most people worldwide living with visual impairment are living in low- and middle-income countries. OBJECTIVE To design and validate a smartphone-based visual acuity test that is not dependent on familiarity with symbols or letters commonly used in the English language. DESIGN, SETT...

Nystagmus intensities at various gaze angles were studied both preoperatively and postoperatively, using accurate ocular motility recordings, in three cases of congenital nystagmus. In addition to shifting the nystagmus null, the surgery broadened the null region and resulted in an overall reduction in nystagmus intensity at all gaze angles. Surgical rotation also resulted in improved visual ac...

PURPOSE To describe the relationship of visual acuity impairment and eye disease on vision-related quality of life, as measured by the 25-item National Eye Institute Visual Function Questionnaire (NEI-VFQ-25), in a cross-sectional, population-based study of older Hispanic persons living in Arizona. METHODS A random sample of block groups with Hispanic residents in Nogales and Tucson, Arizona,...

OBJECTIVE To compare 2-year visual acuity outcomes between similar participants assigned to sham and no-treatment control arms in randomized clinical trials. METHODS We retrospectively matched sham controls from 2 randomized trials to no-treatment controls (no sham or placebo) from 3 trials on 8 baseline prognostic criteria (full matches) or on 4 to 7 criteria (partial matches). Outcomes were...