Clare Louise A Vision examination gives you more than a new glasses prescription. It checks how clearly you see, how well your eyes focus, and whether there are signs that may need monitoring or further care. However, the numbers and terms on an examination report can be confusing without a clear explanation.
Understanding the main results can help you ask better questions and follow your eye care professional’s advice. Here is what common vision tests, eye pressure readings, and retinal checks usually mean.
What Does a Vision Test Measure?
Visual Acuity
Visual acuity measures how clearly you can see details at a set distance. You read letters that become smaller as you move down an eye chart. Each eye is usually tested separately and then together.
In Singapore, results may be written as 6/6, 6/9, or 6/12. A 6/6 result means you can see at six metres what a person with standard vision can see at six metres. A result of 6/12 means you need to be six metres away to see what standard vision can identify at twelve metres.
A lower result does not automatically mean your eyes are unhealthy. It may show a refractive error, such as myopia, hyperopia, or astigmatism, that suitable lenses can correct.
Refraction and Your Prescription
Refraction is the part where the practitioner asks, “Which is clearer, one or two?” Different lens powers are placed in front of your eyes to find the correction that provides clear, comfortable vision.
Your prescription may include:
- Sphere: Indicates short-sightedness or long-sightedness.
- Cylinder: Shows the amount of astigmatism.
- Axis: Describes the direction of the astigmatism correction.
- Add: An extra near-vision power used in reading or progressive lenses.
A small prescription change does not always mean you need new glasses immediately. Your symptoms, current lenses, work habits, and comfort should also be considered.
What Does an Eye Pressure Reading Mean?
Eye pressure, or intraocular pressure, is measured in millimetres of mercury, written as mmHg. The test may use a gentle puff of air or an instrument that briefly touches the eye after numbing drops are applied.
A commonly used reference range is around 10 to 21 mmHg. However, a reading outside this range does not confirm glaucoma, while a reading within it does not completely rule glaucoma out. Eye pressure is only one part of the assessment.
The practitioner may also consider the optic nerve, visual field, family history, age, and previous readings. One unusual measurement may lead to repeat testing or monitoring instead of an immediate diagnosis.
What Happens During a Retinal Check?
The retina is the light-sensitive tissue at the back of the eye. The macula supports detailed central vision, while the optic nerve carries visual signals to the brain.
The practitioner may examine these structures with a viewing instrument, retinal photography, or other imaging when appropriate and available. Dilating drops may sometimes widen the pupils to provide a clearer view inside the eye.
The result may be described as healthy, stable, unchanged, or showing an area that needs review. A retinal check can identify signs associated with diabetic retinopathy, age-related macular degeneration, retinal problems, or glaucoma. Unusual findings may require referral to an ophthalmologist for further assessment.
Why Your Lifestyle and History Matter
Results make more sense when considered alongside your daily activities. Someone who spends many hours on digital screens may have different needs from a person who drives frequently at night or performs detailed close-up work.
Spectacle Hut reflects this approach through its personalised vision assessment, which begins with questions about visual needs and lifestyle before the examination. This helps the practitioner understand where and when you experience difficulty instead of relying on the eye chart alone.
Mention headaches, eye strain, glare, dryness, double vision, flashes, floaters, or sudden sight changes. Medical conditions, medicines, previous eye problems, and family eye-health history can also affect how results are interpreted.
Other Tests You May See
Depending on your symptoms and risk factors, an examination may include:
- Pupil response: Checks how the pupils react to light.
- Eye movement test: Assesses how the eyes follow a target.
- Binocular vision test: Checks how well both eyes work together.
- Colour vision test: Identifies differences in colour perception.
- Visual field test: Measures peripheral, or side, vision.
Not everyone needs every test at every visit. The selection should depend on individual needs and findings.
What Should You Do After the Examination?
Before leaving, ask for a simple explanation of your results. Find out whether your prescription changed, whether anything needs monitoring, and when your next check should be scheduled.
Seek urgent medical attention for sudden vision loss, a curtain-like shadow, severe eye pain, sudden flashes with many new floaters, or an eye injury. These symptoms should not wait for a routine appointment.
A Vision examination is most useful when you understand what was checked and what happens next. Clear results may provide reassurance, while changes can lead to timely monitoring, updated vision correction, or specialist care.
