Visual acuity is the ability of the eye to clearly distinguish fine details of objects at a certain distance. In other words, it indicates how well we see. It is one of the most important indicators of eye health and the first aspect assessed during an eye exam.
Good visual acuity allows us to read, drive, recognize faces, and perform daily activities effortlessly. Its decline can occur gradually and often without obvious symptoms at first.
Why is visual acuity important?
Poor visual acuity can affect:
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performance at work or school
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traffic safety
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visual comfort and quality of life
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long-term eye health
Many eye conditions such as myopia, hyperopia, astigmatism, or presbyopia directly affect visual acuity. That is why regular eye exams are essential, regardless of age.
How is visual acuity measured?
The optotype test (letter panel)
The most well-known method for measuring visual acuity is the optotype, performed using a panel with letters, numbers, or symbols (such as the Snellen chart).
The patient is asked to read the symbols from a standard distance (usually 5 or 6 meters), covering one eye at a time.
What do visual acuity values mean?
Visual acuity is expressed as a fraction or decimal value:
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1.0 (or 10/10) – normal vision
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below 1.0 – low vision
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over 1.0 – above average vision
For example, an acuity of 0.5 indicates that the person sees at half the clarity considered normal.
Visual acuity with and without correction
Testing is performed:
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without glasses or contact lenses – to assess natural vision
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with correction – to check the effectiveness of glasses or contact lenses
The goal is to achieve the best possible visual acuity, with a correction tailored to each patient's needs.
When should visual acuity be checked?
It is recommended:
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annual for adults
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more common for children, pupils, and students
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immediately if symptoms such as blurred vision, headaches, eye fatigue, or difficulty reading occur
A timely check-up can prevent vision problems from worsening and significantly improve visual comfort.
Visual acuity and the right glasses
Optimal visual acuity is achieved with:
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a correct prescription
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quality lenses
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frames adapted to your lifestyle
At Optica Familiei, visual acuity is assessed using modern equipment, and specialists help you choose the ideal solution for clear and comfortable vision.
Visual acuity is an essential indicator of eye health and vision quality. Regular measurement and timely correction of any deficiencies contribute to an active, safe life free from visual discomfort. Take care of your eyes—they carry you through every moment of your life.
