Search results for "Cortical cataract"

showing 3 items of 3 documents

Casteldaccia eye study: prevalence of cataract in the adult and elderly population of a Mediterranean town.

1994

Prevalence of cataract was studied in a population based survey performed in adults aged 40 years or more living in Casteldaccia, a small Sicilian town. Lens opacities of moderate or severe grade (type II or worse, according to the Lens Opacity Classification System II) were found at the following rates: nuclear opalescence in 18.5%, cortical cataract in 12.9%, posterior subcapsular cataract in 10.8%. All these types of cataract were much more frequent in the elderly population and were about 1.5 times more common in women than in men. Late cataract was found in about 1/3 of subjects aged 60 to 69 years, in 2/3 of subjects aged 70 or more, but rarely under 60 years of age. However, early ca…

AdultMalemedicine.medical_specialtyPediatricsVisual acuitygenetic structuresCortical cataractVisual AcuityCataractCataractsAge groupsElderly populationOphthalmologyEpidemiologyLens CrystallinemedicinePrevalenceHumansPopulation based surveySicilyAgedAged 80 and overbusiness.industryAge FactorsMiddle Agedmedicine.diseaseeye diseasesOphthalmologyFemalesense organsmedicine.symptomPosterior subcapsular cataractbusinessInternational ophthalmology
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Refractive changes in nuclear, cortical and posterior subcapsular cataracts. Effect of the type and grade

2015

Purpose: To determine the effect of main morphological types and grades of age-related cataracts on refractive error. Methods: We measured 276 subjects with optical compensation prior to the development of cataract. We evaluated 224 eyes with nuclear cataract, 125 with cortical cataract, and 103 with posterior subcapsular (PSC) cataract classified with LOCSIII. We measured visual acuity (VA) with their spectacles and best-corrected visual acuity (BCVA) with chart in decimal scale to obtain the optimal compensation with cataract. We evaluated the differences between compensations. Results: A significant myopic shift was observed in nuclear cataract from low to mild grade (p = 0.031), the sam…

Malemedicine.medical_specialtyRefractive errorNuclear cataractVisual acuitygenetic structuresCortical cataractVisual AcuityCatarataAstigmatismCataractContrast SensitivityCorticallcsh:OphthalmologyCataractsOphthalmologyLens CrystallineOptical compensationMyopiamedicineHumanslcsh:QC350-467Subcapsular posteriorNuclearIn patientCompensación ópticaAgedAged 80 and overAnalysis of Variancebusiness.industryAstigmatismLens Nucleus CrystallineLens Cortex CrystallineMiddle AgedRefractive Errorsmedicine.diseaseeye diseasesSurgeryPosterior subcapsularlcsh:RE1-994FemaleOriginal Articlesense organsPosterior subcapsular cataractmedicine.symptombusinesslcsh:Optics. LightOptometryJournal of Optometry
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Objective assessment of cataract: Comparison between the Lens Opacities Classification System III and a Scheimpflug camera

2015

Purpose Develop an automatic system for cataract classification using the Sirius Scheimpflug for both nuclear and cortical cataract. Methods Scheimpflug images were taken using the Sirius system in 50 patients with nuclear and/or cortical cataract (mean age 69 ± 9.2 years). The nuclear opacity (NO) and cortical opacity was graded by an ophthalmologist according to the Lens Opacities Classification System (LOCSIII) by comparing the slit-lamp image with the LOCS's standard nuclear images. A custom-made MATLAB program was used to calculate the pixel intensity value within a region of interest (ROI) of the nucleus and to calculate the percentage of opaque pixels in the cortex. Results Eighty-ni…

medicine.medical_specialtygenetic structuresOpacityPixelbusiness.industryCortical cataractScheimpflug principleGeneral MedicinePositive correlationeye diseasesObjective assessmentlaw.inventionLens (optics)OphthalmologyRegion of interestlawOphthalmologymedicineOptometrysense organsbusinessActa Ophthalmologica
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