ESCALA DE SNELLEN PDF

In the English-Japanese dictionary you will find more translations. EN Snellen chart. Similar translations Similar translations for "escala de Snellen" in English. English port of call scale stop-over staging area staging point scale measure standard stop stopover gamut scaling rota. English scalar.

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Snellen visual acuity evaluation. Using a tape measure and a caliper, measurement of the distance was obtained from the sitting patients' eye to VA optotypes projection on the wall. At the same time, measurement of the size of the letters of 4 lines of the VA projection on the wall was performed. It was not surprising that no clinic presented an exact angle of 5 arch minutes.

Comparing clinics results with computerized method, we observed that only 2 clinics obtained better results if compared with the angles obtained from optotypes projection, but the data is very similar and with no statistical significance.

In relation to the other clinics, the superiority of the computerized method is very relevant. All had differences in comparison to the gold standard. Individually, comparing computerized method to standard Snellen theory, it was observed that a condition very close to the ideal was obtained, in other words, results very similar to 5 arch minutes were noted in all the visual acuities analyzed. Also, the same patient, evaluated in different clinics, can obtain different VA measurements.

The computerized method is practical, portable, adjustable for different distances, and maintains optotypes proportionality ratio based on visual angle and approaches the theoretical values recommended by Herman Snellen in Keywords: Visual acuity; Vision; Diagnostic techniques, ophthalmological. Desde Snellen, poucas melhorias na medida da acuidade visual foram feitas.

Estandardizou-se uma tabela com cinco letras em cada fileira iguais ao tamanho da letra. O que pode ser entendido como uma AV superestimada. Coletivamente dividimos os 3 centros de oftalmologia para entendermos como eles se comportavam em grupos. Arq Bras Oftalmol. Comparison of visual acuity in macular degeneration patients measured with Snellen and early treatment diabetic retinopathy study charts. Kniestedt C, Stamper RL. Visual acuity and its measurement.

Ophthalmol Clin North Am. A computerized method of visual acuity testing: adaptation of the early treatment of diabetic retinopathy study testing protocol. Am J Ophthalmol. Rio de Janeiro: Elsevier; Clin Experiment Ophthalmol. Faivre, 63 - Apto. All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License.

Services on Demand Journal. Rua Casa do Ator, - cj. How to cite this article.

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