Optometrists and Opticians Guide - Urgent Symptoms

Optometrists and opticians play an important role in screening and assessing the general public for eye diseases, and making a call on whether it requires an urgent referral. Through routine vision testing when a client comes in for eyeglasses, optometrists and opticians are the first-line in detecting potential eye conditions and diseases.

By identifying red-flag symptoms such as sudden vision changes, field defects, or signs of retinal detachment that necessitate urgent ophthalmology referral, a person's sight can be saved, changing the course of a person's life.

Timely reassessment if symptoms change, supporting early detection, client education, and appropriate escalation up the eye care pathway should be a standard you should always try to aim for.

Urgent Symptoms that warrant an urgent referral:

Vision Changes

• Sudden vision loss (partial or complete), painless or painful

• Acute flashes, new floaters, or a curtain/shadow over vision

• New-onset diplopia, especially binocular or with neurologic symptoms

Pain / Red Eye

• Eye pain with decreased vision

• Red eye with pain, photophobia, or reduced visual acuity

• Halos around lights with eye pain, nausea, or vomiting (?acute angle closure)

• Worsening red eye with discharge and history of contact lens wear or non-compliance

Trauma / Exposure

• Chemical exposure (initiate irrigation immediately, then refer)

• Penetrating or blunt ocular trauma

Infection / Inflammation

• Painful eye with restricted motility, proptosis (eye bulging out), or lid edema (?orbital cellulitis)

• Severe ocular pain out of proportion to exam

Neuro-Ophthalmic Red Flags

• Ptosis with anisocoria or ophthalmoplegia

• Vision loss with headache, scalp tenderness, or jaw claudication (?GCA)

AMD on a fundus photograph.

Non-Urgent referrals:

(always query symptoms to exclude what could be urgent)

Gradual Blurry Vision (One or Both Eyes)

Possible conditions:

• Refractive errors (myopia, hyperopia, astigmatism, presbyopia)

• Cataract

• Age-related macular degeneration

• Diabetic retinopathy

Referral reason: Progressive or unexplained visual decline requires further evaluation.

Difficulty Reading in dimmer light / Needing more light

Possible conditions:

• Early cataracts

• Macular degeneration

Referral reason: To assess for correctable vision changes vs. early cataracts or retinal conditions.

Glare or Halos Around Lights (Especially at Night)

Possible conditions:

• Cataracts

• Corneal irregularities (e.g., keratoconus)

Referral reason: Night-driving difficulty and worsening glare suggest lens or corneal pathology.

Fluctuating Vision

Possible conditions:

• Diabetic eye changes

• Dry eye syndrome

Referral reason: Rule out retinal conditions and manage dry eye disease if any, in order to improve vision stability.

Persistent Dryness, Grittiness, Burning

Possible conditions:

• Chronic dry eye disease

• Blepharitis

• Meibomian gland dysfunction

• Autoimmune-related dry eye (e.g., Sjögren’s)

Referral reason: Diagnose and management to improve QOL for the person, especially if OTC methods have not worked

Chronic Red Eye (Without Severe Pain or Vision Loss)

Possible conditions:

• Chronic blepharitis

• Allergic conjunctivitis

• Episcleritis

• Contact lens complications

Referral reason: Persistent inflammation needs evaluation to rule out deeper disease.

Floaters (Stable, Longstanding)

Possible conditions:

• Posterior vitreous detachment (non-acute)

• Benign vitreous floaters

Referral reason: Even non-urgent floaters should be assessed to exclude retinal tears. Note that sudden increase in floaters with flashes is urgent.

Slowly Progressive Peripheral Vision Loss

Possible condition:

• Primary open-angle glaucoma

Referral reason: For glaucoma workup as glaucomatous visual field changes are not reversible.

Distorted Central Vision (Straight Lines Appear Wavy)

Possible conditions:

• Age-related macular degeneration

• Epiretinal membrane

Referral reason: Macular disease evaluation with retinal imaging is needed to determine cause and treatment.

Double Vision (Intermittent and longstanding without Neurologic Symptoms)

Possible conditions:

• Decompensated phoria

• Cranial nerve palsy (chronic)

• Thyroid eye disease

Referral reason: Requires alignment testing and possible imaging.

Eyelid Changes (Non-Painful, Persistent)

Possible conditions:

• Chalazion lasting >1 month

• Eyelid tumors (e.g., basal cell carcinoma)

• Ptosis (drooping eyelid)

Referral reason: To determine if treatment is required or desired by the person.

Excessive Tearing (Chronic)

Possible conditions:

• Dry eyes with reflex tearing

• Nasolacrimal duct obstruction

• Eyelid position (?ectropian)

Referral reason: To determine structural vs. tear-film cause.

In Children: Squinting, Head Tilt, Reports not seeing well in school

Possible conditions:

• Amblyopia

• Strabismus

• Refractive error

Referral reason: Early intervention and follow-up is best for the child.

Want to elevate your eye care? Perhaps you'd like to do more in terms of eye care for your customers, but don't want the added costs of machinery? Let's have a chat.

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