The Properties Tested By A Vision Tester

The Properties Tested By A Vision Tester

by Molly Morse

A vision tester is a piece of equipment used for testing various properties of sight in human beings. The device screens for various abnormalities in sight and is very important for little kids. The device can be used to identify eye conditions and sight impairments that may later on lead to loss of vision or more dangerous conditions. There are different models of the device and all work differently.

Most eye conditions are easy to correct at a tender age than in maturity. This does not however mean that adults cannot have their eye sight screened for impairments. In fact, it is a basic requirement in certain careers that before a person is hired, there eye sight must be analyzed for suitability. Such careers include the army, security personnel, personal and public drivers, doctors, and pilots among others.

A vision testing machine is capable of doing all necessary tests and provide back the feedback in a short while. The equipment is fast, reliable, precise, and a bit expensive. The high price of the machine renders services to be a little expensive too. The reliability and correctness of the results renders the high service cost worth-while.

The testing process is simple and short making it possible to be conducted in the office of an optician. The condition of the eye is revealed in a short while after the tests are conducted. Young children who are incapable of concentrating are at an advantage because this machine does not consume a lot of time. There are many generations of eye screening machines and the latest models have more powerful features than the previous ones.

There are many tests that this equipment can be used to do. Some of those tests include visual acuity, refraction, color vision test, and refraction. Visual acuity tests are used to gauge the ability of an eye to see details at near and far distances. It is the most common eye test carried out. Each eye is tested independently although some equipment allow testing of both eyes at the same time.

Refraction test aims at determining the refractive error in the eye. It comes after the visual acuity test. Nearsightedness or farsightedness occur when the eye is unable to focus the light from objects correctly on the retina. The result of this is blurred sight. This test should be done as a routine for people who already wear contact lenses or corrective glasses. It can also be performed if the results from the visual acuity test reveal that the eye sight is below usual levels.

Visual field tests aim at determining presence of gaps in the peripheral vision. This examination requires one to focus their sight in a given direction and tell what they are able to see on the sides. Color test checks for the ability of an eye to differentiate between various color shades.

A <A href="http://www.henanmedical.com/titmus-v4-vision-screener--vision-screening-19096.html">vision tester</A> can be controlled by a remote control device. These models are small and portable for use in field applications. The user manual that accompanies them explains the usage of the device explicitly making it usable by people with little or no prior experience.



If you are looking for high quality vision tester equipment click <a href="http://www.henanmedical.com">www.henanmedical.com</a>. Henan Medical carries a complete line of products for the medical community and more details are available at http://www.henanmedical.com today.

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