Vision Problems

Vision problems cover any change in how well you see: blur, distortion, double vision, missing patches, poor night vision or trouble with colours. The great majority are focusing errors, meaning myopia, hyperopia, astigmatism and the age-related loss of near focus called presbyopia, all of which are corrected with lenses or surgery.

The remainder come from disease of the eye or visual pathway, such as cataract, macular degeneration, diabetic retinopathy, glaucoma, retinal detachment, optic nerve disorders or stroke. How the problem began is the most useful clue. Gradual change over months is usually benign or treatable at leisure. Sudden change over minutes to days needs urgent attention.

Symptoms

• Blur for distance, for near, or both
• Straight lines looking wavy or bent
• A dark or blank patch in the centre of vision
• Loss of side vision
• Double vision, with one eye or only with both eyes open
• Glare, haloes and difficulty driving at night
• Flashes of light and floaters
• Faded colours
• Short episodes of vision loss lasting minutes

Causes and risk factors

Focusing errors result from the shape and length of the eye and the stiffening of the lens with age. Cataract clouds the lens gradually. Macular degeneration and diabetic macular swelling damage central vision, while glaucoma and retinitis pigmentosa take peripheral vision first. Retinal vein or artery blockage, retinal detachment, bleeding into the eye, optic neuritis and giant cell arteritis cause sudden loss. Double vision with both eyes open comes from eye muscle or nerve problems. Stroke and pituitary tumours cause field loss in both eyes. Migraine aura produces shimmering zigzags that clear within an hour.

How it is diagnosed

• Visual acuity with pinhole and refraction: If vision improves through a pinhole, the problem is likely to be a focusing error.
• Amsler grid: A simple grid that reveals distortion from macular disease and can be used at home for monitoring.
• Slit lamp and dilated fundus examination: Examines the lens, retina and optic nerve directly.
• OCT scan: Cross-section imaging of the macula and optic nerve, central to diagnosing macular degeneration, diabetic swelling and glaucoma.
• Visual field test: Identifies the pattern of field loss, which points to the eye, optic nerve or brain.
• Eye pressure measurement: Part of glaucoma screening in every adult eye examination.
• Blood tests or brain imaging: Requested for suspected giant cell arteritis, stroke, optic neuritis or a compressive lesion.

Treatment options

• Glasses and contact lenses: Correct the large majority of vision complaints.
• Laser refractive surgery or lens implants: Options for adults with a stable prescription who want less dependence on glasses.
• Cataract surgery: Replaces the cloudy lens with an artificial one, usually as a day case under local anaesthetic.
• Intravitreal injections: Anti-VEGF medicines for wet macular degeneration, diabetic macular swelling and vein occlusion, repeated at intervals over months or years.
• Retinal laser and surgery: Laser for tears and diabetic retinopathy; vitrectomy or buckling for retinal detachment.
• Glaucoma treatment: Drops, laser or surgery to lower pressure and protect the remaining field.
• Treating general health: Control of diabetes, blood pressure and cholesterol, and stopping smoking, protect the retina.

When it is urgent

Seek emergency care locally for sudden loss of vision in one or both eyes, a curtain or shadow across vision, new flashes and floaters, sudden double vision, vision loss with a painful red eye, or vision loss with scalp tenderness and jaw pain on chewing in someone over 50. Brief loss of vision in one eye can be a warning of stroke.

Travelling to Türkiye for treatment

A comprehensive eye examination with imaging can be completed in a day and is a reasonable part of a wider check-up. Planned cataract or refractive surgery fits a short stay. Conditions that need repeated injections or monitoring, such as wet macular degeneration and diabetic eye disease, are better managed near home; a visit can give a second opinion or start a course, but only if continuation is arranged locally.

Send your reports, scans and a short history and a Clinic-Y coordinator replies within 24 hours with suitable teams and written, all-inclusive proposals side by side. Reviewing your case is free.

Frequently Asked Questions