In contrast to minus eye test, eye test cylinder is often neglected ones eye examinations to an optometrist (eye specialist). Eye test cylinder impressed not important as long as the condition is not considered severe. Though efforts early treatment can make a cylinder eye condition easier to manage.
Astigmatism or cylinder eye occurs when the curved lens of the eye is not fully formed. You have an eye cornea or lens cylinder if your eyes are more sharply curved in one direction than another. Many people do not know that most people who wear eye glasses to experience the cylinder at a certain level. Instead, people who experience eye cylinders also tend to have farsightedness (hypermetropia) or nearsightedness (myopia).
Eyes cylinder occurs at birth or appear after suffering from certain diseases, surgery, or eye injury. But certainly, this condition does not occur as a result of sitting too close while watching TV or reading in dim lighting. Therefore, can occur at birth, then there is a possibility of you or your children do not realize that there are disturbances of vision. This is where the importance of regular eye test cylinder.
Observing Different Types of Eye Tests Cylinders
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| One If Presuming Eye Test Cylinder Not Important |
To ascertain the condition of your eye, the eye doctor will do an eye test cylinder in the following ways.
- Vision test. The doctor may ask you to read the letters on the board which is a bit far in front of you, approximately as far as six meters.
- The doctor put some different lenses in front of the eye using a tool called Phoropter. This lens is useful to measure how the eye focuses light. Can also use the retinoscope that directs a beam of light in the eye so that it can determine how the eye focuses light.
- Tests measuring the corneal curvature can be one of the eye test cylinders using a tool called keratometer. Tool called keratoskop measure the reflection of light on the surface of the cornea to then determine if the eyes have astigmatism or cylinder eye. The tendency of the uneven curvature of the cornea is one of the major eye indications cylinder.
- Mapping the cornea with a computer is used to measure variations in the curvature of the corneal surface. How this is done using kerastokop combined with a video camera.
You should have to undergo an eye test cylinder if experiencing certain symptoms. These symptoms may seem mild, but it never hurts to check the eyes, namely headaches, eyesight faint and tired eyes. Buramnya this vision can occur in different directions, like the diagonal, vertical and horizontal, depending on the type of astigmatism experienced.
At a certain stage, astigmatism or cylinder eye can be very annoying, even harmful, everyday activities, such as difficulty reading information on a user board. Therefore, most people with healthy vision aged 40 years and above should undergo an eye test cylinder at least once every two years or every four years maximum. In addition, it is advisable to check the eyes once a year if aged 55 years and 1-2 years after age 65 years.
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