0000000000352426

AUTHOR

Mikael Nilsson

showing 3 related works from this author

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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Comparison of Macular Thickness in Patients with Keratoconus and Control Subjects Using the Cirrus HD-OCT

2014

Purpose.The aim of the present study was to compare macular thickness in patients with keratoconus (KC) with macular thickness in healthy subjects.Subjects and Methods.Twenty-six patients with KC and 52 control subjects were included. The macular structure was evaluated using a Zeiss Cirrus HD-OCT. The scan pattern used was 512 × 128, which covers an area of approximately 6 × 6 mm of the retina. The cube volume was assessed as well as macular thickness in each of the 9 sectors defined by the software.Results.The mean signal strength was significantly lower in the KC group (mean 8.4, range 6–10) compared with the control group (mean 9.7, range 7–10),P<0.0001(unpairedt-test). There were no…

AdultMaleKeratoconusmedicine.medical_specialtygenetic structuresArticle Subjectlcsh:MedicineKeratoconusAge and sexGeneral Biochemistry Genetics and Molecular BiologySignal strengthOphthalmologyHumansMedicineMacula LuteaIn patientGeneral Immunology and Microbiologybusiness.industrylcsh:RHealthy subjectsGeneral MedicineMiddle AgedControl subjectsmedicine.diseaseeye diseasesCase-Control StudiesOptometryFemaleCirrussense organsbusinessTomography Optical CoherenceResearch ArticleBioMed Research International
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Evaluation of the anterior chamber angle in keratoconus and normal subjects.

2015

To evaluate the anterior chamber angle in keratoconus eyes by use of the Visante™ OCT and Orbscan™ II.Anterior chamber angle was measured with the Visante™ OCT and Orbscan™ II in 52 subjects, 26 KC subjects and 26 age and control subjects.When comparing the nasal and temporal angles obtained with the two techniques no correlation was found (R(2) always below 0.01) in either the control subjects or in the KC subjects. Despite this, there was an overall statistically significant difference in mean anterior chamber angles (p0.001) between Visante™ OCT and Orbscan™ II. There was no statistical difference (p0.05) between nasal and temporal anterior chamber angles when comparing controls and KC s…

AdultMaleKeratoconusmedicine.medical_specialtyKeratoconusSensitivity and SpecificityAnterior chamber angleAnterior Eye SegmentReference ValuesOphthalmologymedicineHumansOrbscan iiSlit Lampbusiness.industrySignificant differenceCorneal TopographyReproducibility of ResultsGeneral Medicinemedicine.diseaseControl subjectsOphthalmologyOptometryFemalebusinessTomography Optical CoherenceOptometryContact lensanterior eye : the journal of the British Contact Lens Association
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