What are the Differences Between eye Screening and a Comprehensive Eye Examination?

It goes without saying that the eyes are a complex organ, and so are the complications associated with them.  Therefore, confirming the presence of different eye complications requires different types of diagnostic procedures.

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When visiting an eye doctor, many are confused between eye screening and comprehensive eye examination. If you too are confused, these key differences between the two should give you a clear picture:

1) Eye screening:

Eye screening (also known as eye test) is a basic, brief eye examination. Eye screening is primarily done in order to look for a particular eye problem. Eye doctors perform eye screening to detect the presence of common vision problems (refractive errors), including Hyperopia (farsightedness), Myopia (nearsightedness), and Astigmatism.

After detecting the presence of a particular vision problem, eye doctors refer patients to eye care specialists (ophthalmologists) for in-depth diagnosis and treatment. In children, eye screening is done to look for two common childhood eye conditions, Strabismus and Amblyopia (aka Lazy Eye). It’s a must to take children for eye screening every year.

2) Comprehensive eye examination:-

A comprehensive eye examination can be classified as a detailed eye exam. It is done to get a full evaluation of your vision and overall eye health.  A comprehensive eye examination can last up to an hour or more as there are a number of eye tests that are performed. These include:

What are the differences Between eye screening and a Comprehensive Eye Examination

  • Visual acuity test

Ophthalmologists usually perform a visual acuity test as the first test during a comprehensive eye examination. Visual acuity test involves measuring the sharpness of the vision through an eye chart. Ophthalmologists measure distant and near vision by changing the distance of the eye chart.

  • Refraction test:-

After detecting the refraction error (if there’s any), the ophthalmologist will perform a refraction test in order to accurately determine the eyeglass prescription. Ophthalmologists use an instrument called a phoropter to determine the exact lens power as per the level of refraction error. The ophthalmologist depends upon the feedback of the patient in order to fine-tune the lens power.

  • Slit lamp exam:-

Slit lamp exam is one of the important eye tests performed during a comprehensive eye exam. It is done to detect the presence of complex and serious eye complications such as Diabetic Retinopathy, Corneal Ulcers, Cataracts, Glaucoma, and Macular Degeneration. The eye test involves examining different parts of the eyes under high magnification using an upright microscope. An ophthalmologist checks the lens, conjunctiva, cornea, and iris.

  • Eye movement test:-

Eye movement test, as the name suggests, is done to determine the coordination of both eyes. An ophthalmologist instructs patients to follow a particular object, like a light source, to determine how well can both eyes follow. Improper eye movement can indicate the presence of strabismus; improper eye movement also increases the risk of developing double vision.

  • Pupil dilation test:-

In order to get a better diagnosis of some eye complications like Diabetic Retinopathy, ophthalmologists dilate the pupils in order to get a better view of the affected eye’s internal structures. Ophthalmologists commonly use a dilating eye drop. The eye doctor will shine a bright light into the dilated pupil to see the eyes’ internal structures more clearly.

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