Eye Diagnostics & Investigations
Modern eye care relies on precise diagnostic tools to evaluate different parts of the eye. OSVI Healthcare helps you understand what each investigation involves and arranges access through our specialist network.
Diagnostic Investigations
These are some of the diagnostic tests commonly used in eye care. Your specialist will recommend the ones relevant to your evaluation — not every test is required for every patient.
OCT Scan (Optical Coherence Tomography)
An OCT scan captures detailed cross-sectional images of the retina and optic nerve using light waves, without touching the eye.
It is often used to evaluate retinal conditions and glaucoma. The scan is generally quick and non-invasive; the specialist reviews the images as part of your evaluation.
Fundus Examination
A fundus examination allows the specialist to view the back of the eye — including the retina, optic nerve and blood vessels — often after dilating drops are applied.
This is a common part of comprehensive eye examinations and diabetic or retinal screening.
Visual Field Test
This test maps your complete field of vision, including peripheral vision, and is often used to detect or monitor conditions like glaucoma.
During the test, you typically respond when you notice lights appearing at different points, while the machine records your field of vision.
Tonometry / Eye Pressure Test
Tonometry measures the pressure inside the eye, a key indicator used in glaucoma screening and monitoring.
The test is brief and is a standard part of most comprehensive eye examinations.
Corneal Topography
Corneal topography maps the curvature of the cornea’s surface in detail, helping to detect irregularities such as keratoconus or to plan refractive surgery.
It is a non-contact scan that takes only a few moments to complete.
Pachymetry
Pachymetry measures corneal thickness, an important factor in glaucoma assessment and in evaluating candidacy for refractive surgery.
It is a quick, straightforward test usually performed as part of a broader evaluation.
A-Scan / Biometry
Biometry measures the eye’s length and other dimensions, most commonly used to calculate the correct intraocular lens (IOL) power before cataract surgery.
This measurement supports accurate surgical planning for cataract procedures.
Slit-Lamp Examination
A slit-lamp is a microscope with a bright light source that allows a specialist to examine the front structures of the eye — including the cornea, iris and lens — in magnified detail.
It is one of the most frequently used tools in a standard eye examination.
Retinal Imaging
Retinal imaging captures photographs of the retina for documentation and to track changes over time.
This is often used alongside other retinal tests, particularly for monitoring diabetic retinopathy or other retinal conditions over successive visits.
What to Expect During Testing
Explanation
The specialist or technician explains the test and its purpose beforehand.
Preparation
Some tests require dilating drops or brief preparation.
Testing
Most diagnostic tests are quick, painless and non-invasive.
Results Review
Your specialist reviews the results with you and explains next steps.
Why Choose OSVI
OSVI Healthcare coordinates eye care through our existing specialist network and care coordination team, bringing the same approach we use across our home healthcare services.
A Trusted Care Network
OSVI Healthcare has supported over 20,000 recovered patients through coordinated home and specialist care.
Wide Specialist Network
Access to a broad network of doctors and specialists that OSVI works with across care needs.
Always Available
Our team is available around the clock to help you coordinate consultations and care.
One Point of Coordination
We help manage the back-and-forth of appointments and follow-up, so you have one team to reach out to.
Frequently Asked Questions
Are eye diagnostic tests painful?
Most diagnostic eye tests are non-invasive and cause little to no discomfort. Some, like tonometry, involve brief contact or an air-puff sensation, which your specialist will explain beforehand.
Will I need dilating drops for these tests?
Some tests, such as fundus examination, require pupil dilation, which can temporarily blur near vision and increase light sensitivity for a few hours. Your specialist will advise if this applies to you.
How long do these tests take?
Most individual tests take only a few minutes, though a comprehensive evaluation involving several tests may take longer. Your care coordinator can give you a time estimate when booking.
Do I need all of these tests during one visit?
No — your specialist recommends specific tests based on your symptoms, history and the purpose of your evaluation, not a standard fixed panel.
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The information on this page is provided for general educational purposes only and does not constitute medical advice, diagnosis or treatment. Every patient’s situation is different — please consult a qualified eye care specialist for evaluation and guidance specific to you. In case of a medical emergency, please seek immediate medical attention.