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.
Many eye conditions are simple to rectify at a younger age than at old age. This however does not mean that grownups cannot have their sight screened for abnormalities. In fact, it is a primary requirement in given careers that before an individual is hired, there sight must be assessed for suitability. Such jobs include security personnel, public and personal drivers, the army, aviation and medicine among others.
A vision testing equipment is capable of performing all the necessary tests and give back the feedback within a short period of time. The equipment is precise, fast, reliable, and a little expensive. The high cost of the machine makes services to be a bit expensive too. However, the correctness and reliability of the results makes the high service cost worthwhile.
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 several tests that this device can be used to accomplish. Some of the tests include color vision test, refraction, and visual acuity. Visual acuity tests are utilized to gauge the capability of eyes to see details at far and near distances. Visual acuity is the most commonly done eye test. Each eye is tested separately although some equipment permit testing of both 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 is able to be operated through a PC or a remote control. Remote controlled models are small in size and portable making them suitable for use in field applications. User guides or manuals that come with them explain fully the usage of the appliance making it possible to use it even without prior knowledge or experience.
Many eye conditions are simple to rectify at a younger age than at old age. This however does not mean that grownups cannot have their sight screened for abnormalities. In fact, it is a primary requirement in given careers that before an individual is hired, there sight must be assessed for suitability. Such jobs include security personnel, public and personal drivers, the army, aviation and medicine among others.
A vision testing equipment is capable of performing all the necessary tests and give back the feedback within a short period of time. The equipment is precise, fast, reliable, and a little expensive. The high cost of the machine makes services to be a bit expensive too. However, the correctness and reliability of the results makes the high service cost worthwhile.
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 several tests that this device can be used to accomplish. Some of the tests include color vision test, refraction, and visual acuity. Visual acuity tests are utilized to gauge the capability of eyes to see details at far and near distances. Visual acuity is the most commonly done eye test. Each eye is tested separately although some equipment permit testing of both 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 is able to be operated through a PC or a remote control. Remote controlled models are small in size and portable making them suitable for use in field applications. User guides or manuals that come with them explain fully the usage of the appliance making it possible to use it even without prior knowledge or experience.
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