0000000001034774

AUTHOR

Clara Llorens-quintana

showing 3 related works from this author

Meibomian glands structure in daily disposable soft contact lens wearers: a one‐year follow‐up study

2020

Purpose To assess the impact of daily disposable soft contact lenses on meibomian gland morphology over a period of 12 months. Methods Forty-one subjects (33 experienced and 8 neophytes) were fitted with either silicone-hydrogel or hydrogel daily contact lenses. The study protocol included four visits: baseline, day-2 for contact lens fit and follow-up measurements, as well as after 6 and 12 months of lens wear. Non-contact infrared meibography images were acquired with Keratograph 5M topographer (www.oculus.de) and analysed with an automated method, which objectively estimates the area of gland atrophy, gland length and width, number of glands and gland irregularity. Protocol at follow-up …

AdultMalemedicine.medical_specialtyOne year follow upMeibomian glandlaw.inventionYoung Adult03 medical and health sciences0302 clinical medicineAtrophylawOphthalmologyHumansMedicineOcular Surface Disease IndexProspective StudiesVision Ocularbusiness.industryOsmolar ConcentrationMeibomian GlandsContact Lenses Hydrophilicmedicine.diseaseeye diseasesSensory SystemsLens (optics)Contact lensOphthalmologymedicine.anatomical_structurePatient SatisfactionTears030221 ophthalmology & optometryFemaleDaily disposablesense organsbusinessEarly phase030217 neurology & neurosurgeryFollow-Up StudiesOptometryOphthalmic and Physiological Optics
researchProduct

Design, characterization and visual performance of a new multizone contact lens

2016

Objectives: To analyze the whole process involved in the production of a new bifocal Multizone Contact Lens (MCL) for presbyopia. Methods: The optical quality of a new MCL was evaluated by ray tracing software in a model eye with pupil different diameters with the lens centered and decentered. A stock of low addition (+1.5 D) MCL for presbyopia was ordered for manufacturing. Power profiles were measured with a contact lens power mapper, processed with a custom software and compared with the theoretical design. Nine lenses from the stock were fitted to presbyopic subjects and the visual performance was evaluated with new APPs for iPad Retina. Results: Numerical simulations showed that the tr…

FOS: Physical sciencesMedical Physics (physics.med-ph)Physics - Medical Physics
researchProduct

Visual acuity and contrast sensitivity screening with a new iPad application

2016

We present a new iPad application (app) for a fast assessment of Visual Acuity (VA) and Contrast Sensitivity (CS) whose reliability and agreement was evaluated versus a commercial screening device (Optec 6500). The measurement of VA was programmed in the app in accordance with the Amblyopia Treatment Study protocol. The CS was measured with sinusoidal gratings of four different spatial frequencies: 3, 6, 12 and 18 cpd at the same contrast values of the Functional Acuity Contrast Test (FACT) included in the Optec 6500. Forty-five healthy subjects with monocular corrected visual acuities better than 0.2 logMAR participated in the agreement study. Bland-Altman analyses were performed to assess…

medicine.medical_specialtyVisual acuityVisual acuitygenetic structuresComputer sciencemedia_common.quotation_subject01 natural sciences010104 statistics & probability03 medical and health sciences0302 clinical medicineOphthalmologymedicineContrast (vision)Computer visionContrast sensitivity0101 mathematicsElectrical and Electronic Engineeringmedia_commonbusiness.industryLimits of agreementHealthy subjectsFunctional acuity contrast testHuman-Computer InteractioniPadHardware and ArchitectureTreatment studyFISICA APLICADA030221 ophthalmology & optometryScreeningSpatial frequencyArtificial intelligencemedicine.symptombusinessSensitivity (electronics)
researchProduct