The retina is a thin, delicate layer of light-sensitive nerve tissue lining the inside back wall of your eye. Roughly the diameter of a 50-paise coin, the retina contains approximately 126 million photoreceptor cells — rods (for low-light and peripheral vision) and cones (for colour and fine detail vision). Every image you see — every face, every sunset, every word on this page — is captured by your retina, converted into electrical signals, and transmitted through the optic nerve to your brain.
The retina is irreplaceable. Unlike many other tissues, retinal cells cannot regenerate. Once retinal tissue is damaged or destroyed — whether from detachment, macular degeneration, diabetic retinopathy, or vascular disease — the vision loss from that area is often permanent. This makes early detection of retinal problems one of the most critical priorities in ophthalmology.
At Brar Eye Hospital's Retina Department in Bathinda and Kotkapura, our vitreoretinal specialists manage the full spectrum of retinal diseases — from emergency retinal detachment surgery to long-term management of diabetic retinopathy and macular degeneration. This guide helps you understand your retina, recognise its warning signs, and know when to seek urgent care.
🚨 GO TO AN EYE HOSPITAL IMMEDIATELY (same day — within hours) if you experience:
• Sudden shower of new floaters — many new dark spots, cobwebs, or string-like shapes suddenly appearing in your vision
• Flashes of light (photopsia) — seeing lightning-like flashes, typically at the peripheral vision
• A dark curtain, shadow, or veil spreading across part of your visual field
• Sudden painless loss of vision in one eye
• A sudden "grey blob" blocking central vision
These symptoms suggest retinal tear, retinal detachment, or vitreous haemorrhage — all time-sensitive emergencies where hours determine whether vision is saved.
Nearly everyone experiences occasional floaters — the small spots, lines, or cobweb-like shapes that drift through your vision, particularly visible against a bright sky or white wall. In most cases, these represent benign vitreous opacities — tiny condensations in the vitreous gel that fills most of the eye. They are harmless, cast shadows on the retina, and typically become less noticeable over time as the brain adapts to them.
However, floaters become dangerous when they are:
A sudden increase in floaters typically occurs when the vitreous gel separates from the retina (posterior vitreous detachment or PVD) — a common age-related change. Most PVDs are benign, but in approximately 10–15% of cases, the vitreous pulls on the retina and creates a tear. A torn retina can allow fluid to seep underneath and cause retinal detachment if not treated with urgent laser or cryotherapy.
Retinal detachment occurs when the retina separates from the underlying supportive tissue (retinal pigment epithelium and choroid). Without this support, the retinal cells are deprived of oxygen and nutrients and begin to die within hours. Every minute of detachment in the critical central retina (macula) risks permanent central vision loss.
Types:
Risk factors: High myopia (nearsightedness above -6.00D), previous retinal detachment in the other eye, family history of RD, eye trauma, post-cataract surgery, lattice degeneration (a structural thinning of the peripheral retina)
Treatment: All retinal detachments require surgery. Options include pneumatic retinopexy (gas injection + laser/freeze), scleral buckling (silicone band around the eye to indent the wall), and vitrectomy (surgical removal of vitreous gel with internal repair). Success rates exceed 90% for primary detachments treated promptly. Visual outcome depends primarily on whether the macula (central retina) is still attached — "macula-on" detachments have far better visual recovery.
Diabetic retinopathy is damage to the retinal blood vessels caused by chronically elevated blood sugar levels. It is the leading cause of preventable blindness in working-age adults in India and poses a particularly severe threat in Punjab, which has one of India's highest diabetes prevalence rates. Diabetic retinopathy has no symptoms in early stages — by the time vision is affected, the disease has typically progressed to a serious stage.
Stages:
Treatment: Anti-VEGF injections (bevacizumab, ranibizumab, aflibercept) are the gold standard for DME and early PDR. Laser photocoagulation (pan-retinal or focal) for advanced PDR. Vitrectomy surgery for vitreous haemorrhage or tractional detachment. All people with diabetes should have annual dilated retinal examination — regardless of visual symptoms.
AMD is the leading cause of severe, permanent vision loss in people over 60 in developed countries. It affects the macula — the central, highest-resolution part of the retina responsible for reading, recognising faces, and seeing fine details. AMD does not cause complete blindness (peripheral vision is typically preserved) but can make reading, driving, and recognising faces impossible.
Dry AMD (90% of cases): Gradual atrophy of macular cells. Progression is slow. No specific treatment currently, though the AREDS2 supplement regimen (vitamins C, E, lutein, zeaxanthin, zinc, copper) slows progression in intermediate AMD. Anti-VEGF injections are now showing promise for geographic atrophy (advanced dry AMD).
Wet AMD (10% of cases — but most vision-threatening): Abnormal blood vessels grow beneath the macula and leak fluid and blood, causing rapid and severe central vision loss. Requires urgent anti-VEGF injection treatment to stabilise or improve vision. Patients must monitor their vision daily with an Amsler grid and seek immediate care for any new distortion or central scotoma.
Central or branch retinal artery occlusion (CRAO/BRAO) — essentially a "stroke of the eye" — causes sudden, painless, profound vision loss in one eye. Retinal artery occlusion requires same-day emergency evaluation for potential intervention and urgent systemic workup to identify the underlying cardiovascular cause and prevent stroke. Retinal vein occlusion (CRVO/BRVO) is more common and causes varying degrees of vision loss from retinal haemorrhage and macular edema, typically treated with anti-VEGF injections.
A hereditary retinal dystrophy causing progressive degeneration of rod photoreceptors. Begins with difficulty seeing in low light (night blindness) and progressive peripheral vision constriction (tunnel vision), eventually affecting central vision in later stages. No curative treatment currently, though gene therapy is in active development. Low-vision aids and occupational support are important components of management.
Sudden floaters, flashes, or vision loss require immediate retinal evaluation. Call Brar Eye Hospital now — our team is available.
