Binocular Acuity

High Quality LCD Vision Chart System for Professional Users Offers Unique Features

VistaVision has just released the lastest version of software for all models. A great effort from the DMD MedTech Company to mantain the products at the top with the best price available worldwide. DMD Medtech is the european leader company for 22″, Anti-glare, Positive polarization, LCD Chart system: a unique solution for both monocular and binocular tests.

During an eye test, eye doctors use eye charts to measure how well you see in the distance.

The classic example of an eye chart is the Snellen eye chart, developed by Dutch eye doctor Hermann Snellen in the 1860s.

In the TEST window, press the TEST key in order to access: the eye-chart tests are situated on the left column, which corresponds to the group test 1 yellow key.
Select a test and press CHANGE in order to start it. The test comprehends three eye-chart lines with increasing visual acuity value. In the right edge and in the bottom are showed the data related to the displayed table.

In order to display or hidden these data, press the DATA key. All eye-chart tests have the same functions:

• the UP and DOWN keys permit to increase or decrease the visual acuity value;

• the CHANGE key allows to choose in a pseudo-random way other stimuli to display;

• the left arrow and right arrow keys permit to modify the contrast of the table displayed, according to the logarithmic scale of the sensitivity to the contrast.

In order to change the display of the table, you can use the CHAR, LIN and DIM keys:

the CHAR key allows to display a single type,

the LIN key allows to display either a single or more lines,

the DIM key allows to display lines with equal or increasing visual acuity.

There are two other possible displays by pressing the RED e GREEN key; the table will be divided with a green background on the right and a red one on the left.

The BLACK and WHITE key, on the contrary, allows to invert the background colour with the eye-chart one.

Obviously, whichever is your display, it is possible to change the displayed stimuli by pressing the CHANGE key.

The test works according to a scale chosen in the Scale SETUP menu, as displayed in this window.

With the single type display, by pressing the CHAR key, it is possible to insert the Crowding effect by pressing the RED and GREEN key on the remote control.

How to Carry Out the Vision Examination with VistaVision

We suggest to personalize the medical examination to the patient for the child, for the adult and for the elderly people, in order to carry out the examination to the patient as quick as possible.

Open the SETUP window and enter in the VISIT EXAMINATION window: in this window, it is possible to personalize the left column, central column and right column list of tests according to the kind of examination.

Press the CHANGE key in order to choose the kind of child examination and it will appear the lists of tests entered until that moment for this kind of examination: the adult examination with its tests, the elderly person examination even it with its linked tests.

After having personalized the medical examination to the patient according to your preferences, press the menu key in order to start the examination according to the patient to test.
The kind of visit appears on the top side of the page, near the selected test.

In order to carry out the medical examination to the patient, you can move the selection and press the CHANGE key to start the test. Press the TEST key to return to the previous window or to use the three linked yellow keys:

to the left column the yellow key one, to the central column the yellow key two, to the right column the yellow key three.

Cheaper than competitors’ same level products, VistaVision is different from standard PC based chart panel. VistaVision includes more than 47 dynamic tests, based on distance and test parameters. Worldwide master distributors are welcomed. Please visit website to see demo videos, articles and more.

About the Author

DMD Med Tech s.r.l.
via Monviso 14 10090 Villarbasse (TO) ITALY
Phone#: +39.011.952.8282 Fax#: +39.011.952.840
www.visualacuitytesteyechart.com

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