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Quality of vision with spectacles, special silicone hydrogel and gas permeable ...

Purpose: To evaluate optical quality and visual function in keratoconus patients corrected with RGP contact lenses and a novel special design of silicone hydrogel contact lens. Materials and methods: Twelve eyes of six patients with keratoconus were enrolled to experience a new soft contact lens (Soft-K) for keratoconus made of a silicone-hydrogel material and the outcomes were compared to the performance wit...

Cambios en la elevación en la curvatura anterior y posterior de la córnea antes...

Shedding light on night myopia

First described during the 18th century, the cause of night myopia remains a controversial topic. Whereas several explanations have been suggested in the literature, particularly related with accommodation or chromatic shift in scotopic light conditions, no definitive explanation for its aetiology has been provided. We describe an experiment in which ocular refractive state was objectively and subjectively meas...

MOODLEWATCHER: DETECTION AND PREVENTION OF FRAUD WHEN USING MOODLE QUIZZES

The possibility of obtaining results that have been fraudulently interfered with always exists, in all processes of student testing and evaluation. In traditional methods of evaluation, such as exams carried out using pen and paper, any fraud that occurs is extremely difficult to detect after it has taken place. The use of e-learning environments such as Moodle, however, may bring benefits that can be applied t...

Proclear EP vs placebo : visual outcomes and symptoms of asthenopia in non-pres...

Anterior and posterior corneal elevation after orthokeratology and standard and...

Quality of life with different modes of visual correction

Impact of in vivo soft contact lens dehydration in perception of light distortion

Prevalence of refractive conditions in the general population attending eye car...

The purpose of this study was to report the fi rst estimations on the prevalence of refractive conditions in a Portuguese population attending several ophthalmologic and optometric clinics within the same region. Methods: Values of non-cycloplegic subjective refraction from the right eye of 4288 patients (40.08±18.75 years) were analyzed to estimate the prevalence of refractive conditions as a function of age a...

In vivo estimation of lamb carcass composition by real-time ultrasonography

The objective of this study was to evaluate the accuracy of ultrasonography to measure fat thickness in live lambs and predict carcass composition to find a system that can assess carcass composition easily and accurately, without damage to the product and can improve carcass classification. Fat thickness (FTh) between the 12th and 13th ribs and between the 3rd and 4th lumbar vertebrae, was measured in vivo us...