A Detailed Guide to Different Eye Tests And Examinations
Adults and children must have their eyesight checked every two years or if they notice certain visionary distortion – however, only after consulting the optometrist. The details provided here will guide you on the many different eye tests a specialist may perform during an eye examination. In addition to a detailed examination of the eye, other tests as listed below may be done if your optometrist wishes to gather further information.
The applanation tonometry method
An ophthalmologist in Abu Dhabi may refer you for an applanation tonometry as this particular eye test helps in diagnosing glaucoma. This is done through measuring the pressure required to compress a portion of the cornea. The test is performed by placing dye/peroxide in the eye through a thin and dipped paper strip. The patient is usually given local anaesthetic drops, so the procedure should be painless.
The dye then stains the front of the eye, allowing the specialist to perform a thorough, more detailed eye examination. The pressure is measured using a tonometer either attached to a slit lamp or with a hand-held technique.
Corneal & retinal topography
These are computerised tests to create a topography or map of the cornea’s curvature or retinal surface. While the test isn’t necessary during a routine eye check-up, anomalies such as swelling, scarring or perhaps astigmatism require the tests as prescribed by an ophthalmologist in Abu Dhabi.
The corneal topography test is performed to evaluate patients before they undergo refractive surgery, corneal transplants or fitting of contact lenses. A retinal topography test is conducted on patients suffering from serious retinal anomalies that require immediate attention.
The eye test to evaluate circulation of the blood in the retina is known as the fluorescein angiogram. It’s useful in the diagnosis of retinal detachment and diabetic retinopathy. During the test, a special dye known as fluorescein is injected into a vein in the arm which quickly circulates to the blood vessels inside the eye.
On reaching the eye, a camera equipped with special filters is used for imaging the highlighted fluorescein as it flows through the blood vessel. It enables the doctors to diagnose any circulation issues or interior swelling, leaking or abnormal blood veins.
Pupillary dilation test
During this test, an ophthalmologist in Dubai places special drops in the eye causing the pupil to expand/dilate. Dilating the pupil allows a thorough examination of the retina for clear symptoms of a disease or vision anomaly.
Prescriptions for eye glasses are determined through this test. The patient sits around six metres away from a chart or a mirror with letters and numbers. The patient has to read them while looking through a special instrument known as a phoropter.
Lenses of varying strengths are placed in front of the eye as the patient reads to determine the appropriate prescription. The eye test also identifies certain vision anomalies such as presbyopia, myopia, hyperopia and astigmatism.
A microscope shines a beam of light into the eye, in the shape of a small slit. An ophthalmologist in Abu Dhabi may also dilate the eye in between examinations. The eye test helps in diagnosing retinal detachment, macular degeneration, cataracts, presbyopia or corneal injuries.
This list of different eye tests and examinations is crucial in the identification of vision-based anomalies.s