Eye Focus

 

 

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            Preliminary Examination

The basic eye examination requires about 15-30 minutes. This may vary depending on the number of tests deemed necessary. Most optometrists will start by asking you some common questions, such as any complaints you are currently having with your vision. If you have any, then you will be asked the duration of the problem and degree that affects you.
There will also be questions concerning the time since your last eye exam, any pre-existing eye problems, your occupation, hobbies, and general health status. In addition, questions about your families eye health history, any allergic reactions to medications. The purpose of this query is to provide the optometrist with an idea of what may be affecting your vision. It also highlights any potential problems that may arise based on your families eye health history and occupation. All information collect are strictly private and confidential.

 

Visual Acuity

One of the first tests that you will encounter is a visual acuity test. This is performed using the familiar chart with rows of letters. You will be asked to read progressively smaller rows of letters until they become indistinguishable. Even if you have to guess, try to make out the smallest letters possible to help aid the eye care practitioner in obtaining a good idea of your visual acuity. If the optometrist reports that you have 6/6 vision, that means you can see a cm gap at a distance of . If you have for example, 6/12 vision, this indicates if, on average, a person can see letters at 6 m, you will need to be at 3 m (half the distance). In addition to the distance visual test, a similar near vision test may be conducted.

Color Vision Testing

Color vision defects are common, expecialy for males. The most familiar colour vision problem involves confusing reds and greens. Some individuals may also have problems with colors in the blue-yellow range. The standard test for assesing color vision defects is the Pseudoisochromatic plates described below.

The Pseudoisochromatic plates--This test is contained in a book and consists of a variety of color plates. The plates have different patterns such as numbers, letters, figures, or a winding path within a series of dots that vary in hue and brightness from the background. For example, one plate may have a background of orange dots and the figure will be in olive dots. To a person with normal color vision, this is easily distinguished but to someone who is dichromatic (two colors appear to be the same like red and green) no figure will be seen.

 

Ocular Health

 

The optometrist will check to make sure your eyes are healthy. This is done using a variety of instruments, including but limited to, slit lamp, ophthalmoscope, fundoscopy lens and binocular indirect ophthalmoscope.

It is possible for your optometrist to instill certain eye drops to assist with the ocular health assessment. The optometrist will advise why the drops are used, and what effects it will have.
 

Mydriatic drops are used to dilate the pupils to allow a large field of view when assessing the back of the eye (fundus). This also allows the optometrist to view the fundus with stereopsis (3D), and allows for a more detailed ocular assessment.

 

 

 

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Send mail to Nicholas.Nguyen@eyefocus.com.au with questions or comments about this web site.
Last modified: 11/25/09