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 numerous tests that this appliance can be utilized to attain. Some of the tests comprise of refraction, visual acuity, and color vision test. Visual acuity tests are important in gauging the capability of eyes to objects at far and/or near distances. Visual acuity tests are the most commonly performed eye test. The eyes are tested separately even though some appliances permit testing of two eyes concurrently.
Refraction test targets at establishing the refractive error in eyes. It is done after visual acuity test. Farsightedness and nearsightedness occur when the eyes are unable to focus light from objects on the retina correctly. This result into blurred sight. This test needs to be performed as a routine for individuals who already wear glasses or contact lenses. It could also be performed in case the results from visual acuity test indicates that the eyesight is below normal 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 vision tester 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.
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 numerous tests that this appliance can be utilized to attain. Some of the tests comprise of refraction, visual acuity, and color vision test. Visual acuity tests are important in gauging the capability of eyes to objects at far and/or near distances. Visual acuity tests are the most commonly performed eye test. The eyes are tested separately even though some appliances permit testing of two eyes concurrently.
Refraction test targets at establishing the refractive error in eyes. It is done after visual acuity test. Farsightedness and nearsightedness occur when the eyes are unable to focus light from objects on the retina correctly. This result into blurred sight. This test needs to be performed as a routine for individuals who already wear glasses or contact lenses. It could also be performed in case the results from visual acuity test indicates that the eyesight is below normal 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 vision tester 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.
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