You enter a space reserved for healthcare professionals.

In accordance with the French law n°2011‐2012 of December 29, 2011 relating to the reinforcement of the health security of the drug and the health products, click here to certify that you are a health professional and thus be authorized to access information.

I attest that I am a healthcare professional :

image produit image produit
image produit

Optometric tests of relief vision

Ref: T26 - T27

Choice of chart depending on patient type

Literate or illiterate adults


2 models available

Fly stereotest

Butterfly stereotest

Simple to set up and transport

All information on this product

Fly stereotest

The fly test (or Wirt's Stereotest) is an optometric test of relief vision. It is one of the most common tests to check for peripheral stereoscopy, especially in children.

It is made up of two plates of polarized images to look at with the glasses provided: on the right the test plate of the fly and on the left the test plate of Wirth comprises a series of symbols spread over three lines of which only one is in relief on each line. It also includes a series of squares each comprising 4 circles, one of which must be perceived in relief


Butterfly stereotest

The stereo butterfly test is composed like the fly but with a butterfly image on the right. It enables relief perception for both gross stereopsis and fine depth perception.


Fly test = ref. T26

Butterfly test = ref. T27

  • 2 plates of polarized images in a black booklet case
  • Closed dimensions (LxH): 210 x 170mm
  • Printing: black color
  • 1 pair of glasses supplied with each test
  • Accessories: possibility to order the glasses alone

Class I Medical Device

You will also like :

image produit

Hand charts

The Parinaud test is an optometric chart that measures near visual acuity
This website uses cookies to measure its audience and to improve your user experience. By continuing to browse this site, you accept the use of these cookies.
More informations