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Binoptometer® 4P

A Superlative Vision-Screening Instrument

  • Portable
  • Individually Programmable
  • Examination of All Relevant Visual Functions
  • Highlights
  • Software
  • Accessories
  • Reviews
  • FAQ
  • Technical Data
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A Superlative Vision-Screening Instrument

The Binoptometer® 4P is a professional screening instrument for testing all relevant visual functions. The used future-oriented technology allows an almost unlimited representation of various vision tests.

Vision-screening instrument with contrast sensitivity testing and optional mesopic vision and glare sensitivity testing.

  • New Test Presentation
    Vision tests are presented on a high-resolution micro-color display, allowing a virtually unlimited presentation of vision tests.
  • Unbeatable
    Contrast sensitivity, optional mesopic vision and glare sensitivity testing with just one instrument.
  • Ergonomic
    Convenient height adjustment range of 4.13 in. In addition, the viewing angle is fully adjustable up to a 35° downgaze, thus enabling testing to be done ergonomically with any eyeglasses.
OCULUS Binoptometer® 4P


Visual Acuity Test

With Landolt rings (in acc. with DIN EN ISO 8596), numbers, letters, tumbling E and acuity symbols for children (optional).

New: Now also ETDRS Charts are available for the visual acuity test.

Colour Vision Test

Large selection of colour plates according to Ishihara and Velhagen-Broschmann colour test plates. The display is calibrated to the exact color temperature, thus guaranteeing ideal color rendering.

Binocular Test

The binocular vision tests are generated by a modern LCD shutter system, which is very similar to natural visual conditions. Furthermore, a variety of stereo-vision and phoria tests guarantees a reliable evaluation of the binocular vision functions.

Contrast Sensitivity Test

A program for testing contrast sensitivity under photopic conditions is also integrated. The contrast sensitivity test can be conducted at various visual acuity levels with Landolt rings, letters and numerals as options.

Mesopic Vision and Glare Sensitivity (Optional)

Visual performance varies in different light conditions. To test visual function under mesopic conditions, a Landolt ring is presented in an environment of low light density (0.032 cd/m²), corresponding to the situation of night driving.

The Landolt ring (visual acuity level 20/200) is presented in four different contrast stages (1:23 / 1:5 / 1:2.7 / 1:2). Glare sensitivity is tested by simulating the dimmed light of an approaching vehicle. The test with this glare light is also conducted in the four contrast stages.

New: Due to additional corrective lenses in the range of -0.5 D to -3.5 D the possibility to check night myopia is now available.


Optotypes for Children

In addition to the tumbling-E test, we have added additional optotypes for testing the visual acuity of children. These are based on the H-test optotypes.

Peripheral Visual Field Test

The visual field is tested at seven visual field locations at the right and at the left. Fixation control is done by means of a changing fixation mark in the center of the test screen.

Additional Corrective Lenses

If asthenopic symptoms are present or if the visual acuity values are abnormal, the additional corrective lenses in the range of +4,5 D to -3,5 D can be used to determine whether an undetected (latent) hyperopia (up to +1,5 D), an age-related long sightedness (presbyopia) or myopia, especially night myopia, exist.

Range of Accommodation Measurement

Measurement of the range of accommodation can be a valuable tool for deciding whether special eyeglasses for computer users are needed. The Duane test figure makes a speedy and informative measurement possible.


The Heart of the Binoptometer® 4P

Detailed Printouts
Program Editor
Improved Color Vision Tests
ETDRS Charts
In addition to the already familiar, short results overview, you can now get a more detailed presentation of the results, visual acuity, color vision test and the Amsler test. Here, you get an overview of all of the answers given by the patient.

  • The list of pre-programmed examination programs can be customized according to your requirements. The order of the programs can be changed and examination programs that you don’t need can be hidden.
  • Custom programs can be created and existing programs can be copied and edited.

The instructions for use of the original Ishihara, Velhagen and Matsubara color chart tests state a time within which a chart should be read. To ensure reliable results, we have now also implemented this recommendation in the Binoptometer® 4P. You have the option to activate this function.
For the visual acuity test the well-known ETDRS charts (based on the Early Treatment Diabetic Retinopathy Study) are now available in the Binoptometer® 4P.
Detailed Printouts Program Editor Improved Color Vision Tests ETDRS Charts




Mesopic vision testing under true-to-life conditions

The external light shield of the Binoptometer® 4P permits mesopic vision tests independent of room conditions. It protects the eyes against incident light, allowing examinations also to be conducted in bright rooms.

Transport Trolley for Binoptometer® 4P

The convenient trolley provides the maximum protection for your Binoptometer® 4P. With its smooth-running castors and pull-out handle, this transport trolley is the ideal helper for your mobile use of the unit.

Carrying Bag for Binoptometer® 4P

This practical carrying bag can comfortably hold your Binoptometer® 4P and all of its accessories, such as netbook or control unit, test blocks and cables.

Easy to use

The Binoptometer® 4P can be easily operated using a Windows computer (netbook, laptop, PC or tablet).



You can always add optional software modules to your Binoptometer® 4P without a problem. You do not need to send your Binoptometer® 4P back to OCULUS to activate a new software module.

Are you interested in purchasing further software modules? Then please contact your OCULUS distributor. They can enable new modules on your Binoptometer® 4P in just a few steps.

The Binoptometer® 4P is equipped with what is called a GDT interface. This makes it possible to exchange examination data with an external practice management software or export data as PDF files. You also have the option of exporting your data in an Excel file via a CSV interface.
The Binoptometer® 4P can be operated using a normal desktop computer, laptop or tablet. Its software is optimized for touchscreen operation. All you need on the device is an operating system based on Microsoft Windows (Windows 7 or higher) and a free USB port.
We recommend using the external light shield when testing mesopic vision or glare sensitivity. To obtain the most accurate results with these tests the examinee must be allowed to adapt to the dark for a few minutes. In case your Binoptometer® 4P is set up in a room that cannot be darkened sufficiently, you can use it with the external light shield. This shields the examinee’s eye completely from outside light, allowing the eyes to adapt to the dark.

The external light shield can also help in situations where distracting light reflexes or glare cannot be avoided due to ambient conditions in the examination room.

With the optional height adjustment you can offer your examinee a comfortable sitting position at the Binoptometer® 4P, even if you are travelling and don’t know the conditions at the intended place of use.

The Binoptometer® 4P comes in two versions – one with and one without height adjustment and it is not possible to convert between the two.

In order to test binocular vision (i.e. coordination between the left and right eye) it is necessary to present a slightly different picture to each eye. There are various ways of achieving this in a vision testing device.

The Binoptometer® 4P uses a shutter system for image separation. The shutter system can also be used to cover up the eye that’s not being tested. It consists of a split plate with two liquid crystal surfaces (one for the right and one for the left eye) that is integrated into the unit. The liquid crystal surfaces can be electronically switched between a light-transmissive and a non-light-transmissive state. This makes it possible to virtually cover up the right or left eye as desired.

With this setup of the Binoptometer® 4P an examinee’s binocular vision can be tested by alternately presenting images to the left and right eye on the unit’s high-resolution display. The shutter plate switches synchronously so that each image only reaches the eye it is intended for. This switching back and forth happens at a very high frequency that cannot be perceived by the human eye. If you alternately close your right and left eye during a phoria test on the Binoptometer® 4P you will see two different images.

Vision tests using the Binoptometer® 4P can be performed at different distances. This is helpful for example when carrying out VDU (visual display unit) workplace investigations. If the examinee is wearing multifocal or progressive glasses during the investigation, he will use different portions of his glasses for different testing distances in order to achieve the best possible visual acuity. The adjustable viewing angle of the Binoptometer® 4P allows the test field to be positioned in such a way that the examinee will not go beyond his habitual eye movement patterns in order to see the optotypes through the appropriate portion of his glasses. This enables him to maintain a comfortable sitting posture and head carriage throughout the test.

We recommend that the viewing angle be adjusted for the best possible visual acuity by the examinee herself. This will allow the examiner to judge the suitability of her current spectacles for certain visual tasks. For example, if she sets the viewing angle within the range of 30° to 35° for mid-distance visual tasks (50 to 60 cm testing distance), it can be assumed that her current near-vision prescription (normally determined at 30 to 40 cm) is no longer sufficient. The selected viewing angle is recorded by the Binoptometer® 4P software for each test step so that it can be looked up at a later time.

In addition to its well-known capacity for light and dark adaptation the eye also adapts to colour (colour adaptation or chromatic adaptation). For example, a white sheet of paper always has the same white appearance regardless of whether we look at it in daylight or in artificial light. In reality, however it has a blue hue in daylight and a yellow hue in artificial light. The reason why we always see it in the same colour is that our eyes adapt to the ambient light conditions (chromatic adaption).

This adaptation to colour can also occur during a colour perception test designed to detect colour blindness. Prolonged gazing at a colour perception test such as the Ishihara plates can therefore lead to distorted results. To avoid this the examinee is shown the plates for only a few seconds, followed by a white screen. This moment is indicated to the examiner by a grey cross appearing on the screen above the colour plate just shown. The examinee can still select the appropriate answer after the plate has disappeared. The default presentation times in the Binoptometer® 4P are as follows:

  • Ishihara colour plates: 4 seconds
  • Velhagen-Broschmann plates: 15 seconds
  • Matsubara colour plates: 10 seconds
  • These recommended presentation times can be changed manually in the Binoptometer® 4P software by selecting “settings” and then “system”.
    The eyes’ adaptation to darkness is a long process which can take up to 30 minutes. However, the mesopic vision test of the Binoptometer® 4P is performed under mesopic light, i.e. twilight conditions, so partial dark adaptation is sufficient. Usually this is achieved within 5 minutes. Most young people, and others with very good contrast vision, are able to see the optotypes of the mesopic vision test after only one minute.

    Technical Data

    Brightness of exam field Approx. 300 cd/m²
    Equivalent to standard light D 65 (color tests D55)
    Generation of vision test Micro color display, 800 x 600 pixels
    Interface USB
    Unit dimensions (W x D x H) Unit with height adjustment 8.8 x 8.7 x 17.7 – 21.9 in
    Unit without height adjustment: 8.8 x 8.7 x 17.7 in
    Weight Unit with height adjustment: 12.3 lbs (incl. power cable)
    Unit without height adjustment: 10.6 lbs (incl. power cable)
    Max. power consumption 60 VA
    Voltage 100 – 240 VAC
    Frequency 50 – 60 Hz
    Recommended computer specifications Intel® Atom™ Z8350, 32 GB storage, 2 GB RAM, Windows® 10

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    Tel. +1 888 284-8004