Eye Conditions Visualizer
This visualizer analyzes your responses and reveals potential eye conditions you might have.
However, it is NOT a substitute for a professional eye examination. Always consult an eye care professional for diagnosis and treatment.
Glossary of Eye Conditions
Myopia
Myopia, also known as nearsightedness, is a refractive error where the eye focuses light in front of the retina, instead of directly on it. This is usually because the eyeball is too long or the cornea is too curved. As a result, distant objects appear blurry, while close objects can be seen clearly (hence "nearsighted"). It often develops in childhood and can progress with age.
Hyperopia
Hyperopia, also known as farsightedness, is a refractive error where the eye focuses light behind the retina. This typically happens because the eyeball is too short or the cornea is too flat. Young individuals with hyperopia can often compensate by using their eye muscles to focus, potentially seeing clearly at a distance, but experiencing eyestrain. However, near vision is typically blurry (hence "farsighted"), and with age, even distant vision can become blurred.
Astigmatism
Astigmatism is a refractive error caused by an irregular shape of the cornea (the front surface of the eye) or the lens inside the eye. Instead of being perfectly round like a basketball, the cornea or lens is shaped more like a football. This uneven curvature causes light to focus at multiple points, resulting in blurry or distorted vision at all distances. It often occurs alongside myopia (nearsightedness) or hyperopia (farsightedness).
Presbyopia
Presbyopia is an age-related condition where the eye's lens gradually loses its flexibility. This makes it increasingly difficult to focus on near objects, such as when reading or using a smartphone. It's a natural part of aging, typically starting around age 40, and affects nearly everyone eventually. Unlike myopia (nearsightedness) or hyperopia (farsightedness), it's not due to the shape of the eyeball, but rather the hardening of the lens.
Strabismus / Diplopia
Strabismus is a condition where the eyes do not align properly and point in different directions. One eye may turn inward, outward, upward, or downward while the other eye focuses on a target. This misalignment can be constant or intermittent. Diplopia, commonly known as double vision, occurs when a person sees two images of a single object. It can be caused by strabismus, nerve issues, or other eye conditions.
Anisometropia / Antimetropia
Anisometropia is a condition where the two eyes have significantly different refractive powers (e.g., one eye is nearsighted and the other is farsighted). This can lead to uneven focus and strain. Antimetropia is a type of anisometropia in which the two eyes have opposite refractive errors. One eye is myopic (nearsighted) while the other is hyperopic (farsighted). This difference in focusing power can make it difficult for the brain to combine both images into a single clear picture. It may cause visual discomfort, eye strain, reduced depth perception, and difficulty with binocular vision.
Phoria
A tendency for the eyes to misalign when focusing on an object, but the brain corrects this misalignment to maintain single vision. It is often detected during eye exams and may not cause symptoms unless the eyes are tired or stressed.
Convergence Excess
A condition where the eyes over-converge (turn inward too much) when focusing on near objects. This can cause eye strain, headaches, and difficulty reading.
Convergence Insufficiency
A condition where the eyes struggle to turn inward properly when focusing on near objects. This can cause double vision, eye strain, and difficulty with tasks like reading or using a computer.
Divergence Excess
A condition where the eyes over-diverge (turn outward too much) when focusing on distant objects. This can cause difficulty maintaining clear vision for faraway objects.
Divergence Insufficiency
A condition where the eyes struggle to turn outward properly when focusing on distant objects. This can cause double vision, eye strain, and difficulty with tasks like driving.
Tropia / Amblyopia
Tropia is a noticeable misalignment of the eyes, where one eye turns inward, outward, upward, or downward. Unlike phoria, this misalignment is constant and not corrected by the brain. Amblyopia, often called "lazy eye", occurs when one eye has reduced vision because it is not properly stimulated during early childhood. The brain favors the stronger eye, leading to poor development of vision in the weaker eye.
Colour Vision Deficiency
Commonly referred to as colour blindness, it is the inability to distinguish certain colours, most often red and green. It is usually genetic and occurs when the colour-sensitive cells in the retina do not function properly.
Visual Dyslexia
A condition where individuals experience difficulty with reading and interpreting written words due to visual processing issues. It is not the same as dyslexia, which is a language-based learning disorder, but it can coexist with it.
Nystagmus
A condition where the eyes make repetitive, uncontrolled movements, often side-to-side, up and down, or in a circular pattern. This can affect vision, balance, and coordination.
Digital Eye Strain
Also known as computer vision syndrome, it occurs after prolonged use of digital screens (computers, phones, tablets). Symptoms include eye strain, dryness, blurred vision, headaches, and neck or shoulder pain.
Pre-presbyopia
A stage before presbyopia (age-related difficulty focusing on near objects) where individuals may begin to notice subtle changes in their near vision, such as needing more light to read or experiencing mild eye strain.
