Cataract Symptoms: Blurred Vision, Glare, Color Changes & When to See a Doctor

Cataracts—clouding of the natural lens—develop gradually. Early changes are subtle; symptoms worsen over months to years.

Common Symptoms

• Blurred/hazy vision — often first sign; like looking through frosted glass.
• Glare & halos — especially night driving (oncoming headlights, streetlights).
• Dulled/faded colors — yellow‑brown tint as lens yellows.
• Reduced contrast sensitivity — difficulty in low light, reading fine print.
• Frequent prescription changes — "myopic shift" as lens density increases.
• Monocular diplopia — double vision in one eye (lens irregularity).

When to See an Ophthalmologist

• Symptoms interfere with daily activities (driving, reading, hobbies).
• Vision not correctable to 20/40 or better with glasses.
• Glare disability affecting safety.
• Desire for refractive outcome (e.g., reduce glasses dependence).

Diagnosis

• Visual acuity, refraction.
• Slit‑lamp exam: nuclear, cortical, posterior subcapsular opacity grading (LOCS III).
• Dilated fundus exam (rule out coexisting pathology).

Treatment

• Early: Updated glasses, anti‑glare coatings, brighter lighting.
• Definitive: Phacoemulsification + IOL implantation — 10–15 min, outpatient, >98% success.
• IOL options: monofocal, toric (astigmatism), extended depth‑of‑focus, multifocal/trifocal, light‑adjustable.

Prevention/Delay

• UV‑blocking sunglasses.
• Smoking cessation.
• Diabetes control.
• Antioxidant‑rich diet (lutein, zeaxanthin, vitamins C/E).