What is a Vision Screening Test?

A vision screening test is a simplified version of an eye exam that is designed to detect vision problems early on. Usually, if any kind of eye problem is detected, a referral is made to a qualified ophthalmologist or optometrist who will conduct a comprehensive eye examination.

Eye care is important at all stages of life; however, vision screening tests are mostly conducted on children, in schools or at GP surgeries, rather than in a specialized eye clinic. This allows early identification of a range of eye disorders that can then be dealt with by qualified health professionals.

Here, we explore what’s involved in a vision screening test, what to look out for, and when to see a specialist care professional. Read on to learn more.

 

What do they do in a vision screening?

A vision screening test usually consists of three main elements, each of which is used to determine a different area of vision testing. They include:

Visual Acuity Testing

Visual acuity testing requires both reading ability and cooperation, and so is generally only suitable for older children and adults. The test asks the patient to identify letters and shape on an eye chart from a distance of 20 feet. Covering one eye at a time can help to identify eye problems in wither the left or right eye.

Eye and Pupil Inspection 

This type of test is suitable for all ages, as it requires not cooperation or comprehension skills. Both the shape and colour of the eye are assessed, usually with a pen light. Both pupils should be the same size and react in the same way when the light is shone into them, becoming smaller as the eye reacts to the light.

Photoscreening 

Using a special camera, photo screening identifies eye problems like refractive errors and other ocular abnormalities.

Colour Blindness Test

This test checks for potential colour blindness, usually in children. The patient is shown a picture of coloured numbers or symbols on a background of multicoloured dots. If the numbers or symbols are invisible, then the patient has a form of colour blindness.

 

What are the normal results of a vision screening?

Normal results of a vision screening test are simply presented as no apparent problems; however, since these tests are simple and rudimentary, a patient may still need to see a qualified optometrist or optician later in life for a comprehensive eye examination.

 

What eye diseases are screened for?

Vision screening tests differ from more complex eye tests in that they only look for potential symptoms of a range of eye disorders and abnormalities. Some of the most common eye diseases and conditions screened for include:

• Amblyopia — Poor vision in one eye, sometimes known as “lazy eye”, caused by a problem with how the brain and eye work together.

• Strabismus — Known as “cross eyes” or “wall eyes”, this condition cause one or both eyes to look in different directions.

• Astigmatism — Generally blurry vision which makes it difficult to see at night.

• Myopia (short sighted) — This condition makes seeing at distance difficult and objects appear blurry.

• Hyperopia (far sighted) — This condition makes seeing close-up diffifcult and object appear blurry,

 

What equipment is used in a vision screening test?

A broad range of vision screening equipment is available to help aid the test and generate measurable results. Distance charts, Ishihara Color Blindness Tests, pinhole occluders, and electroretinography can all be used within vision screening.

You’ll find a comprehensive range of vision screening equipment at Medshop, with dedicated tools and kits for children too. Explore the range today and ensure your school or clinic has the right equipment to catch vision problems at an early age. Additionally, check out the blog for more information on a broad range of healthcare and medical topics.

What Is an Eye Exam? 

An eye examination is a detailed assessment conducted by an optometrist or ophthalmologist to check overall eye health. It goes beyond vision testing by evaluating for eye disorders like glaucoma, cataracts, and refractive errors. Regular eye examinations are essential for detecting issues early and preventing vision loss, especially in older adults.

Eye Exam Procedure  

An eye examination involves a series of tests to assess visual acuity, eye alignment, depth perception, and eye health. Health professionals may dilate the eyes to check the retina and optic nerve for signs of eye diseases like glaucoma or cataracts. For individuals who wear contact lenses or are considering eye surgery, comprehensive exams are crucial.

Vision Screening for Children 

A vision screening program is essential for maintaining child health, as early detection of vision issues can prevent long-term complications. In Australia, free vision screening is often available in schools and healthcare settings, enabling early identification of problems such as amblyopia (lazy eye) or strabismus (crossed eyes), ensuring timely intervention by a care professional.

Vision Screening vs. Eye Exam 

While vision screening is a quick method to identify potential issues, it does not replace a full eye examination conducted by an optometrist or ophthalmologist. Screenings are usually part of routine health checks for children, but adults should undergo regular, more comprehensive eye exams to detect conditions like glaucoma or cataracts before they lead to vision loss.

The Importance of Vision Checks and Eye Exams 

Regular vision testing and eye exams are critical for maintaining long-term eye health. In Australia, routine checks and vision screening programs in schools help safeguard child health. Adults, particularly those at risk for conditions like glaucoma or cataracts, should have regular eye exams to prevent irreversible vision loss.

 

Author: Steven John Cumper, B.App.SC. (Osteo.), M.Ost., is a businessman with a strong foundation in biomedical science and osteopathic medicine, who founded and led Medshop to international success, culminating in its acquisition by the Bunzl Group in September 2021, where he continues to serve as Managing Director (Medshop Group).