Lucent Chart Digital Acuity System will help you assess visual acuity more accurately in wider range of settings for both adults and children.
What is Visual Acuity
Visual acuity refers to a person's ability to see small details. It is also referred to as clarity of vision or sharpness of vision.
A visual acuity score is the result of a vision test performed by an optometrist or ophthalmologist. Opticians, technicians, and nurses can also perform a visual acuity measurement.
It is usually written as a fraction. This measurement describes your ability to see an object from 20 feet away compared to a person with normal vision.
For example, 10/10 vision means that you can see an object clearly from 10 feet away.
Optometrists use your visual acuity to help determine your eyeglasses prescription.
Visual acuity is dependent on a combination of optical and neural elements, including:
- The health and functionality of the retina
- How sharply the retina forms images
- How well your brain can interpret sensory inputs
Refractive errors or neural factors usually cause poor visual acuity.
Refractive errors are visual impairments that affect the way light is bent, or refracted, in your eyeball.
Common refractive errors include:
- Hyperopia (farsightedness)
- Myopia (nearsightedness)
- Astigmatism (irregular curvature of the cornea)
Neural factors occur in the retina, brain, or the pathway between the two.
Examples include:
- Age-related macular degeneration (AMD)
- Detached retina
- Amblyopia (lazy eye)
- Brain injuries
- Stroke
Most of the time, lower visual acuity can be corrected by eyeglasses, contact lenses, or refractive surgeries.
