•Dr Priscilia Imade
Poor vision can result from various underlying causes, ranging from common refractive errors to more serious eye conditions and systemic health issues. There are diverse origins of poor vision, knowing them is essential for accurate diagnosis and appropriate management.
Here are some common causes:
Refractive Errors:
Myopia (Nearsightedness): Individuals with myopia have difficulty seeing distant objects clearly. This occurs when the eyeball is too long or the cornea has too much curvature.
Hyperopia (Farsightedness): Farsighted individuals struggle with close-up vision due to a shorter eyeball or a flatter cornea, causing light to focus behind the retina.
Astigmatism:
Irregular shape of the cornea or lens leads to blurred or distorted vision at any distance.
Cataracts:
Cataracts involve the clouding of the eye’s natural lens, typically associated with aging. This condition progressively impairs vision by obstructing the passage of light to the retina.
Glaucoma:
Glaucoma is a group of eye conditions characterised by increased intraocular pressure, leading to optic nerve damage. It often results in peripheral vision loss, and if left untreated, can cause permanent blindness.
Macular Degeneration:
Age-related macular degeneration (AMD) involves the deterioration of the macula, the central part of the retina. AMD can lead to a loss of central vision, affecting tasks such as reading and recognising faces.
Diabetic Retinopathy:
Diabetic retinopathy is a complication of diabetes that damages blood vessels in the retina. It can lead to vision impairment, including blurred or distorted vision, and in severe cases, blindness.
Retinitis Pigmentosa:
This is a genetic disorder that causes a progressive degeneration of the retina, leading to night blindness, tunnel vision, and, in advanced stages, complete blindness.
Amblyopia (Lazy Eye):
Amblyopia occurs when one eye does not develop normal vision during childhood. It may result from strabismus (misalignment of the eyes) or a significant difference in refractive error between the eyes.
Strabismus:
Strabismus is a misalignment of the eyes, which can lead to double vision and, if not corrected, may cause amblyopia.
Infections and Inflammations:
Infections such as conjunctivitis (pink eye) and inflammations like uveitis can cause redness, pain, and temporary or permanent vision loss if not treated promptly.
Injuries and Trauma:
Physical injuries to the eye, whether through accidents, blows, or penetrating trauma, can result in visual impairment or loss.
Systemic Health Conditions:
Systemic health issues like high blood pressure, autoimmune diseases, and neurological disorders can impact vision by affecting blood vessels, nerves, or other components of the visual system.
It is important to note that poor vision can be temporary or permanent, and its management depends on the specific cause. Regular eye examinations and prompt medical attention are crucial for identifying the cause of poor vision and implementing appropriate interventions to preserve or improve visual function.
*Dr Priscilia Imade is CEO, Modern Eye Clinic, Lagos. E-mail: moderneyecliniclagos@gmail.com
Another edition of the column returns on Monday in The Frontier.
