El test de Snellen és una prova dissenyada per avaluar l’agudesa visual. Rep el nom en honor de l’oftalmòleg holandès Herman Snellen qui va dissenyar la. Table: Different notations of visual acuity values as decimal values, Snellen fractions, MAR and LogMAR. Decimal. Snellen fractions. MAR. LogMAR. 6m 5m. 4m.

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Explicación del examen de la vista y tablas optométricas

In relation to the other clinics, the superiority of the computerized method is very relevant. All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License.

Ophthalmol Clin North Am. Comparison of visual acuity in macular degeneration patients measured with Snellen and early treatment diabetic retinopathy study charts. Visual acuity; Vision; Sneloen techniques, ophthalmological.

A computerized method of visual acuity testing: Services on Demand Journal.

Test de Snellen

It can be concluded that there is a great heterogeneity in the evaluation of VA in different Ophthalmology centers. How to cite this article.


O que pode ser entendido como uma AV superestimada. Descriptive study including 15 Ophthalmology ssnellen and a computerized method to measure the VA. Faivre, 63 – Apto.

To evaluate the visual acuity VA measurement by Snellen chart at three main Ophthalmology centers in Curitiba, compare these measurements with a computerized method for calibrating VA and also with the standard theory developed by Hermann Snellen. Also, the same patient, evaluated in different clinics, can obtain different VA measurements. Kniestedt C, Stamper Ed.

Test de Snellen – Viquipèdia, l’enciclopèdia lliure

Estandardizou-se uma tabela com cinco letras em cada fileira iguais ao tamanho da letra. Fernando Klein Rua Dr. 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 It was not surprising that no clinic presented an exact angle of 5 arch minutes. Snellen visual acuity evaluation.

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.


All had differences in comparison to the gold standard.

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. Coletivamente dividimos os 3 centros de oftalmologia para entendermos snlelen eles se comportavam em grupos. Rua Casa do Ator, – cj.

Desde Snellen, poucas melhorias na medida da acuidade visual foram esdala. At the same time, measurement of the size of the letters of 4 lines of the VA projection on the wall was performed.

Using a tape measure and snelllen caliper, measurement of the distance was obtained from the sitting patients’ eye to VA optotypes projection on the wall. To analyze the results, it was opted to compare the angles presented by each clinic for each measurement.

Visual acuity and its measurement.