What is a cataract?
If vision looks cloudy or misty, colours seem faded, and new glasses don't help — that's likely a cataract: clouding of the natural lens inside your eye.
Searching for "cloudy vision", "colours look faded", "glare from headlights", or "beginning of a cataract"? Those usually mean lens clouding — explained below.
Why don't my glasses fix it anymore?
Because the blur is inside the lens, not at the cornea. Glasses correct refractive error — they cannot clear a clouded crystalline lens. Only surgery removes the opacity and replaces it with a clear IOL.
A cataract is progressive clouding of the eye's natural crystalline lens. Proteins within the lens clump together over time — often with age — scattering light instead of focusing it cleanly. Vision becomes misty, contrast drops, and colours look dull or yellowed.
Cataracts are the world's leading cause of reversible vision loss — surgery restores clarity by removing the clouded lens and implanting a synthetic intraocular lens (IOL). There is no proven eye drop, supplement, or medication that reverses a cataract.
Cataracts vs presbyopia: presbyopia is lens stiffening (reading blur from mid-40s); cataracts are lens clouding (often later, but can overlap). See cataracts vs presbyopia — many patients over 55 have both.
Symptoms of cataracts
The classic pattern is gradual cloudy vision at all distances — plus faded colours, glare, and halos at night — that glasses cannot fully correct.
People also ask
- Why do colours look yellow or washed out? A yellowing lens filters blue light — whites look cream and the world loses vividness. Many notice the difference only after surgery.
- Why is night driving harder? Light scatter from a cloudy lens causes glare and halos around headlights and streetlights — often before distance acuity fails a number-plate test.
- My prescription keeps changing — is that a cataract? A developing nuclear cataract can shift your prescription (sometimes toward myopia). Frequent changes despite new glasses are a red flag.
- Optician said "beginning of a cataract" — do I need surgery now? Not always urgently — but timing matters for IOL choice and biometry accuracy. See when to have surgery.
- Can LASIK fix a cataract? No — LASIK reshapes the cornea. The clouding is in the lens; only lens surgery treats it.
- One eye worse than the other? Common — cataracts often develop asymmetrically. Both eyes are usually treated, not always on the same day.
Cloudy or misty vision
Like a smeared windscreen — not fully corrected by updating your glasses prescription.
Faded or yellowed colours
Often unnoticed for years — post-surgery colour vividness is a common "wow" moment.
Glare and halos
Disabling glare can appear before you fail a standard vision test — especially for night driving.
Reading and detail harder
Reduced contrast sensitivity — edges and low-contrast objects disappear into the haze.
How do I know if I have a cataract?
You likely have a cataract if vision is progressively cloudy, colours faded, glare worse, and glasses no longer fully help — confirmed by slit-lamp examination.
- 1Vision feels misty or less sharp at distance and near — not fixed by new glasses.
- 2Colours look dull, yellow, or washed out compared with memory or the other eye.
- 3Glare from sun or headlights bothers you more than a few years ago.
- 4Optician or ophthalmologist saw lens clouding on examination — or prescription changes frequently.
Diagnosed early?
Timing affects IOL choice — not just urgency.
Early-stage cataracts may not need immediate surgery — but premium IOL biometry is often more predictable before the lens becomes very dense.
Cataracts vs presbyopia
Presbyopia is lens stiffening (reading blur from mid-40s). Cataracts are lens clouding (often 60+). Both affect the same lens — surgery with a premium IOL can address both.
| Cataract | Presbyopia | |
|---|---|---|
| What changes | Lens becomes cloudy — scatters light | Lens stiffens — cannot focus up close |
| Typical age | Often 60+ (can be earlier with diabetes, steroids, trauma) | Mid-40s onward — everyone |
| Distance vision | Usually blurs as cataract progresses | Often unchanged if no other error |
| Glasses help? | Partially at first — not once clouding advances | Reading glasses help until surgery chosen |
| Treatment | Cataract surgery — phaco + IOL | RLE with trifocal/EDOF IOL |
| Same surgery? | Yes — phacoemulsification + IOL. Cataract = cloudy lens; RLE = clear lens removed proactively | |
Read the full comparison: Cataracts vs presbyopia.
What causes cataracts?
Most cataracts are age-related. UV exposure, smoking, diabetes, long-term steroids, and eye trauma can accelerate clouding.
By age 65, many adults have some degree of lens clouding; prevalence increases with age. No diet or eye exercise has been proven to reverse cataracts once they form — sunglasses with UV protection may modestly delay onset.
Treatment options for cataracts
The only effective treatment is surgery — phacoemulsification removes the clouded lens and replaces it with an IOL. IOL type (monofocal, trifocal, or EDOF) determines whether you need reading glasses after.
Definitive · only proven fix
Cataract surgery
Phacoemulsification removes the clouded lens through a micro-incision and implants a clear IOL — ~15 minutes per eye under topical drops.
Full cataract surgery guide → IOL choiceMonofocal vs trifocal vs EDOF
Monofocal: sharp distance, reading glasses for near. Trifocal/EDOF: near + intermediate + distance — spectacle independence for most tasks.
Compare IOL types ↓ Same procedure · earlier timingLens replacement (RLE)
Identical surgery before the lens clouds — often chosen in 50s for presbyopia with premium IOL while biometry is still optimal.
RLE guide → Often co-existsPresbyopia
Reading blur from lens stiffening — trifocal IOL at cataract surgery can correct both clouding and near vision together.
Presbyopia guide → Combined prescriptionMyopia + cataract
IOL power is calculated to correct short-sightedness alongside cataract removal — same single procedure.
Myopia guide → UK patientsNHS vs private timing
NHS cataract surgery often uses standard monofocal IOL with waiting lists — premium lens choice and timing differ abroad.
UK patient guide →Monofocal vs trifocal vs EDOF — which IOL?
Monofocal IOL restores excellent distance vision — reading glasses still needed. Trifocal IOL (e.g. PanOptix) maximises spectacle independence. EDOF IOL balances intermediate/distance with fewer night halos. Read: Monofocal vs trifocal IOL · Trifocal vs EDOF IOL.
| Monofocal IOL | Trifocal IOL | EDOF IOL | |
|---|---|---|---|
| Distance | Excellent | Excellent | Excellent |
| Intermediate (screens) | Needs glasses | Excellent | Excellent |
| Near (reading) | Reading glasses required | Excellent — dedicated near point | Good — fine print may need slight help |
| Night halos | Minimal | Moderate initially — usually adapt 4–8 weeks | Less structured halos |
| Typical choice | Happy with reading glasses; sharpest night vision priority | Full spectacle independence priority | Frequent night drivers; halo-sensitive patients |
Can cataracts be treated without surgery?
No. No eye drop, supplement, or laser on the cornea removes lens clouding. Glasses help early refractive shifts — they cannot clear an advanced cataract.
Products claiming to "dissolve" cataracts are not supported by reliable clinical evidence. When clouding affects daily life — driving, reading, work — surgery is the established treatment.
When should I have cataract surgery?
When vision affects daily life — or earlier if you want a premium IOL while biometry is still optimal. You do not have to wait until vision is severely impaired.
Often the right time if
- Driving, reading, or work affected — or glare is disabling at night
- Optician confirms cataract and glasses no longer adequate
- You want trifocal/EDOF IOL before lens becomes very dense
- Both eyes planned — often one trip for bilateral surgery
- Realistic expectations about premium IOL adaptation (night halos initially)
May need to wait or optimise first
- Early clouding with minimal functional impact — monitor with optician
- Uncontrolled glaucoma or active retinal disease — treat first
- Only eye with useful vision — extra caution and specialist planning
- Unrealistic guarantee of perfect vision without any night artefact
When clouding affects daily life — driving, reading, work — surgery is the established treatment. Read our detailed guide: When to have cataract surgery?
Cataracts after LASIK
Cataracts can develop after LASIK — the cornea was corrected but the natural lens continues ageing and may cloud in your 60s or earlier with risk factors. Cataract surgery remains fully possible with modified IOL biometry.
Post-LASIK cataract surgery uses the same phaco + IOL technique — surgeons apply post-refractive formulas for accurate lens power. Read: Can LASIK fix cataracts? (no — only lens surgery treats clouding).
Cataracts and driving
Glare from oncoming headlights often appears before you fail a number-plate test — many patients seek surgery when night driving becomes unsafe, not when distance acuity alone triggers concern.
Only an eye examination confirms whether your vision meets driving standards in your country — we do not provide legal driving advice. Functionally, disabling glare is a common reason to plan cataract surgery earlier rather than waiting for dense clouding.
Cataract surgery vs RLE — when is which?
Same surgery (phaco + IOL) — different timing. RLE removes a clear but stiffening lens proactively (often 50s for presbyopia). Cataract surgery removes a cloudy lens when clouding affects vision (often 60+).
Premium IOL biometry is often more predictable before the lens becomes very dense — a reason some patients choose RLE earlier. Compare: Cataract surgery vs RLE · Lens replacement guide.
Can both eyes be done in one trip?
Yes — bilateral cataract surgery in one Istanbul trip is common for international patients. Surgeon protocol determines whether both eyes are treated on the same day or consecutive days — typically ~5 nights total stay.
Your coordinator plans timing, aftercare drops, and remote follow-up after you travel home. Share both eyes' status for a personalised surgical plan.
Recovery after cataract surgery
Most patients notice brighter, sharper vision within days. Full stabilisation takes weeks; premium IOL neural adaptation for halos may take 1–3 months. Plan ~5 nights in Istanbul for bilateral surgery.
Follow your drop schedule strictly. Avoid rubbing the eye, heavy lifting, and swimming until cleared. Remote video follow-up is arranged after you travel home. About 20–30% of patients develop posterior capsule opacification (PCO) years later — treated with a quick YAG laser in minutes.
What does cataract surgery cost?
Cost depends on IOL type (monofocal, trifocal, or EDOF), one or both eyes, and package inclusions — not a single fixed price for everyone.
Premium trifocal or EDOF lenses cost more than standard monofocal because of the custom IOL and extended aftercare. Share your prescription, IOL goals, and travel dates for a personalised quote.
IOL type
Monofocal, trifocal, and EDOF are priced differently — premium lenses deliver near + distance vision.
One or both eyes
Bilateral cataract surgery in one trip is common; timing depends on surgeon protocol.
Combined prescription
Myopia, hyperopia, or astigmatism correction is included in the same IOL calculation — not a separate procedure.
Package inclusions
Hospital, IOL, hotel, transfers, medication, and aftercare vary by package.
Share your details for a no-obligation quote — or read how we support international patients.
Why travel for cataract surgery?
International patients choose Istanbul for premium IOL choice (trifocal, EDOF), JCI-accredited hospitals, bilateral surgery in one trip, and coordinator-led aftercare.
iSee Turkey partner hospitals use major IOL platforms (e.g. Alcon PanOptix, Zeiss AT LISA) with biometry and named surgeon confirmation before travel. Many UK patients cite IOL choice and waiting time as reasons to plan surgery abroad — see UK patient context for NHS wait background, not as medical advice.
Considering surgery abroad?
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Go deeper
Detailed cataract guides
Go deeper on timing, IOL choice, LASIK confusion, presbyopia overlap, and when RLE vs cataract surgery makes sense.