Results 41 to 50 of about 406,516 (266)

Development of Contact Lens Suitability System (ClenSyst) [PDF]

open access: yes, 2009
This paper proposes a system that can determine the suitability of contact lenses usage.The aim of this work is to provide a decision making system by using the application of fuzzy logic to analyze and decide the appropriate type of contact lenses based
Che Hamzah, Jemaima   +3 more
core   +1 more source

Treatment of irregular astigmatism by topography-guided ablation [PDF]

open access: yesRevista Brasileira de Oftalmologia
Topography-guided ablation was designed to improve corneal regularity throughout the correction of corneal high order aberrations. The present report described three cases with different indications for topography-guided ablation to correct irregular ...
Adriana Geremias Toni   +5 more
doaj   +1 more source

Comparison of Corneal Parameters of Children with Diabetes Mellitus and Healthy Children

open access: yesJournal of Ophthalmology, 2019
Purpose. To compare differences in central corneal thickness (CCT), corneal curvature, and other corneal measurements of children with diabetes mellitus (DM) and healthy children, and to investigate related factors. Methods. This was a case-control study.
Shanshan Wang   +6 more
doaj   +1 more source

Study of the dynamic tear film aberrations using a curvature sensing setup [PDF]

open access: yes, 2006
The advancement in adaptive optics in recent years has increased the interest in the dynamic aberrations of the eye, including those introduced by the first optical surface provided by the tear film.
Gruppetta, S., Lacombe, F., Puget, P.
core   +2 more sources

The variability of corneal and anterior segment parameters in keratoconus [PDF]

open access: yes, 2016
Purpose: To analyse, describe and test diverse corneal and anterior segment parameters in normal and keratoconic eyes to better understand the geometry of the keratoconic cornea. Method: 44 eyes from 44 keratoconic patients and 44 eyes from 44 healthy
Cardona Torradeflot, Genís   +3 more
core   +1 more source

Corneal stromal demarcation line after collagen cross-linking in corneal ectatic diseases: a review of the literature [PDF]

open access: yes, 2016
Collagen cross-linking (CXL) is a relatively new conservative approach for progressive corneal ectasia, which is able to strengthen corneal tissue reforming new covalent bonds.
SPADEA, LEOPOLDO   +2 more
core   +1 more source

A Fractal Approach to Nonlinear Topographical Features of Healthy and Keratoconus Corneas Pre- and Post-Operation of Intracorneal Implants

open access: yesFractal and Fractional, 2022
Fractal dimension (FD) together with advances in imaging technologies has provided an increasing application of digital images to interpret biological phenomena.
Shima Bahramizadeh-Sajadi   +5 more
doaj   +1 more source

Corneal topographic changes after 20-gauge pars plana vitrectomy associated with scleral buckling for the treatment of rhegmatogenous retinal detachment

open access: yesRevista Brasileira de Oftalmologia, 2013
PURPOSE: To evaluate the changes in corneal topography after 20-gauge pars plana vitrectomy associated with scleral buckling for the repair of rhegmatogenous retinal detachment.
Alexandre Achille Grandinetti   +5 more
doaj   +1 more source

Influence of overnight orthokeratology lens fitting decentration on corneal topography reshaping

open access: yesEye and Vision, 2018
BackgroundThis retrospective study was designed to investigate the sole influence of orthokeratology (OK) lens fitting decentration on the Zernike coefficients of the reshaped anterior corneal surface.MethodsThis study comprised a review of 106 right ...
Jiaojie Chen   +4 more
semanticscholar   +1 more source

Placido-based indices of corneal irregularity [PDF]

open access: yes, 2011
Purpose: To construct a set of metrics computed from the raw keratoscopic data collected by any Placido corneal topographer. These indices that measure the irregularity of the anterior corneal surface are computed directly from the image of the mires ...
Ramos López, Darío
core   +1 more source

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