This E-hook indicator (Snellen indicator) is used as an aid for visual acuity testing. In the event that the test person cannot or does not want to answer verbally, this indicator can be used. The test person can indicate what the answer is by turning the E-hook in the correct way.
The dimensions of this indicator are 17.5 x 6.5 cm. The thickness is 3 mm.
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The indicator in the form of an e-hook is used as an aid for visual acuity testing and is particularly suitable for use with preschool children or illiterate children. The so-called Snellen hook is characterized by three bars of equal length. The width of the bars and the distances between them are also the same. During the visual acuity test, it should be possible to see from a set distance where the open side of the E-hook is. To do this, the display fork can be turned by the patient in the respective direction.