Compare conditions

Put any two — or three — conditions side by side, adult or pediatric, to spot the look-alike differences fast, row by row.

Cataracts

—

In one line

—

Normal physiology

·The lens is a clear, flexible disk that sits right behind the colored part of your eye (the iris). Its only job is to focus light rays so they land sharply on the retina at the back of the eye, giving you clear vision at different distances.

—

What goes wrong

·The proteins inside the lens start to clump together and turn from clear to cloudy, like egg whites turning white when you cook them. This clouding scatters light instead of letting it pass straight through, so the image that reaches your retina is blurry, dim, or washed out.

—

Hallmark signs

—

Red flags · escalate now

·Sudden, painful loss of vision (may signal acute angle-closure glaucoma, retinal detachment, or infection rather than simple cataract)
·Red, painful eye with cloudy cornea (suggests acute glaucoma or infection, not cataract alone)
·New floaters, flashes of light, or a curtain over part of vision (possible retinal tear or detachment, especially after cataract surgery)
·Vision loss in an infant or young child (congenital cataract can cause permanent vision loss if not treated early)
·Rapidly worsening cataract in one eye only (may indicate trauma, inflammation, or another eye disease)

—

Workup

—

Treatment

·Phacoemulsification cataract surgery with intraocular lens (IOL) implantation
·Topical antibiotic drops (e.g., moxifloxacin) started one day before surgery and continued for 1–2 weeks after
·Topical corticosteroid drops (e.g., prednisolone acetate 1%) four times daily, tapered over 2–4 weeks
·YAG laser capsulotomy for posterior capsule opacification (PCO)
·Updated eyeglass prescription and brighter lighting while waiting for surgery
·Urgent cataract extraction for phacomorphic glaucoma (when the swollen lens blocks drainage)

—

NCLEX trap

·Cataracts cloud the lens itself (the clear part inside your eye that focuses light), so regular glasses won't fix it. The lens has actually become cloudy — like a foggy window — and only surgery to replace that cloudy lens can restore clear vision. Always think cataract when an older adult describes gradual, painless blur that glasses don't help.
·Age-related cataracts usually start after 60, but they can appear earlier — especially in people with diabetes, long-term steroid use, or a history of eye trauma or radiation. Never ignore progressive blur just because someone isn't elderly; ask about risk factors and refer for an eye exam.
·Modern cataract surgery is one of the safest, most successful procedures in all of medicine — over 95% of people see better afterward. The right time for surgery is when vision loss interferes with daily life (reading, driving, cooking), not when the patient is nearly blind. Delaying too long can make surgery harder and increase fall risk in the meantime.
·Halos can happen with cataracts (light scatters through the cloudy lens) or with glaucoma (pressure damages the optic nerve). Don't guess — refer to an eye doctor for a full exam that checks both the lens and the optic nerve pressure. Cataracts cause painless halos; acute glaucoma usually brings severe eye pain and redness, which is an emergency.

—

Install Maldek by Hill as an app — studies work even offline