Condition Symptoms

Photokeratitis Symptoms

Delayed onset after UV exposure — typically several hours later.

Bilateral eye pain.

Marked photophobia.

Epiphora.

Foreign body / gritty sensation.

Redness.

Blepharospasm.

Possible mild ↓VA.

Usually history of welding/UV exposure without adequate PPE

Corneal Abrasion Symptoms

Redness

Acute unilateral pain

Foreign body sensation

Photophobia

Epiphora

Blepharospasm

After trauma/FB

↓VA.

Scleritis symptoms

Redness

Severe deep pain ± pain on eye movement

Photophobia +

Diffuse/violaceous redness

↓VA.

Episcleritis symptoms

Mild discomfort

Red eye

FBS ± photophobia

Normal VA

Sectoral/diffuse bright red superficial vessels.

± tender mobile red vascular nodule.

Bacterial conjunctivitis symptoms

Rapid onset

Unilateral → bilateral

Red eye

Mucopurulent/purulent yellow-green discharge

Crusting on waking

Mild irritation.

Usually normal VA, minimal pain/photophobia.

Papillae ± SPK/marginal infiltrates.

Viral conjunctivitis symptoms

Acute

unilateral → bilateral

red eye

watery discharge

follicles

irritation/FBS ± mild photophobia.

Often URTI/contact history + preauricular LN.

VA usually normal.

Adenovirus → possible SPK/keratoconjunctivitis.

Allergic conjunctivitis symptoms

Bilateral + INTENSE ITCHING

Redness

Watery/stringy discharge

Chemosis ± lid oedema.

Usually normal VA.

Often recurrent/seasonal + atopy/rhinitis.

Chlamydial conjunctivitis symptoms

Chronic/persistent

Often unilateral

Red eye

Mucopurulent discharge

Follicles ± preauricular LN.

Usually mild discomfort + normal VA.

May fail topical antibiotics.

Blepharitis symptoms

Usually bilateral/chronic

burning

grittiness/FBS

mild photophobia

crusting/red lid margins

often worse AM.

epiphora

fluctuating VA,

DED.

Dacryocystitis symptoms

Acute → sudden painful, red, tender medial canthal/lower lid swelling + epiphora + mucopurulent discharge/reflux from punctum ± fever.

PVD symptoms

Acute floaters ± flashes/photopsia

Possible blurred/hazy vision.

Usually painless

Unilateral.

Floaters = dots/lines/cobwebs;

Flashes = lightning/arcs from vitreoretinal traction.

Retinal tear/ break symptoms

Acute flashes

New/increased floaters ± blurred vision/vitreous haemorrhage.

Usually painless.