Eye answers people can trust
Understand your eyes without getting lost.
Eye Health Guide is a nonprofit-style public resource for clear symptom guidance, condition explainers, and surgeon-reviewed eye information designed for people first and AI answer engines second.
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What eye symptom are you worried about?
Searches the full site. Press Enter or use Search site in the header.
Urgent symptoms Sudden vision loss, severe pain, injury, or new flashes and floaters need same-day medical advice.
Simple by design
Find the right eye guidance in seconds.
Instead of starting with medical jargon, Eye Health Guide starts with what people notice: symptoms, timing, risk, and what to do next.
Pain and redness
Check urgencyChildren and emergencies
Same-day adviceEveryday concerns
Learn next stepsOr jump straight to a symptom
- Blurred vision
- Red eye
- Eye pain
- Itchy eyes
- Dry, gritty eyes
- Flashes and floaters
- Double vision
- Light sensitivity
- Watering eyes
- Sudden vision loss
- Eye discharge
- Swollen eyelid
- Eye strain
- Halos around lights
- Difficulty seeing at night
- Cloudy vision
- Burning eyes
- Distorted vision
- Peripheral vision loss
- Pressure behind the eye
- Feeling of something in the eye
- Yellow eyes
- Leukocoria (white pupil reflex)
- Unequal pupils (anisocoria)
- See all symptoms →
Quick answers
Common eye health questions, answered first
Browse all conditions · Check your symptoms
Frequently asked questions
What is Eye Health Guide?
An independent, multilingual eye health resource with answer-first articles on conditions, symptoms, treatments, and practical eye-care topics. Content is structured for clarity, accessibility, and clinical review.
Which eye symptoms are an emergency?
Sudden vision loss, a new shower of floaters or flashing lights, a curtain or shadow over your vision, severe eye pain, chemical splash, trauma, or double vision with weakness or speech changes need same-day medical care.
How often should adults have eye exams?
Many adults benefit from a full eye exam every one to two years, and more often with diabetes, a strong glasses prescription, or a family history of glaucoma or macular degeneration.
Can I use this site instead of seeing a doctor?
No. This site provides general information only and never replaces a personal consultation, diagnosis, or treatment plan from your own eye-care professional.
Is the content medically reviewed?
Yes. Reviewed articles are checked by qualified eye-care professionals. Review dates are shown on reviewed pages.
What languages are available?
The site is available in English, Spanish, and Indonesian, with the same answer-first structure across languages.
Answer-first topics
The eye library should feel effortless.
Six high-traffic topics with quick answers, urgency advice, reviewer metadata, and links into the full library.
Cataracts
Clinically reviewedA cataract is clouding of the eye's natural lens, causing gradual blur, glare and faded colours. It is very common with age and the only effective cure is surgery to replace the cloudy lens with a clear artificial implant. Surgery is usually day-case and highly successful when daily activities are affected.
Clouding of the lens with age causing blur and glare; surgery replaces the cloudy lens when daily life is affected.
Glaucoma
Clinically reviewedGlaucoma is a group of diseases that damage the optic nerve, often related to raised pressure inside the eye. The most common type (open-angle) has no early symptoms — peripheral vision fades unnoticed. Acute angle-closure glaucoma is a painful emergency. Regular eye pressure and optic nerve checks are vital because lost sight cannot be restored.
Optic nerve damage often linked to eye pressure; the common type is silent until side vision is lost — regular tests are essential.
Macular degeneration
Clinically reviewedAge-related macular degeneration (AMD) damages the macula — the central retina used for reading and faces. Dry AMD is more common and progresses slowly. Wet AMD involves leaky blood vessels and can blur or distort central vision within days, needing urgent treatment. Report sudden waviness, smudgy central vision or blank patches promptly.
Age-related loss of central vision affecting the macula; dry AMD is common and slow, wet AMD needs urgent treatment.
Dry eye
Clinically reviewedDry eye disease happens when the tear film is unstable — from too little watery tear production, or oil glands not working so tears evaporate too fast. It causes grittiness, burning, watering and blur that fluctuates. It is chronic but manageable with lubricating drops, lid hygiene, screen breaks and sometimes prescription treatments or punctal plugs.
Tears too few or evaporating too fast; overlaps with blepharitis and MGD — lubricants, lid care and prescription options help most people.
Diabetic retinopathy
Clinically reviewedDiabetic retinopathy is damage to the retina's small blood vessels caused by diabetes. Early stages often have no symptoms, so photographic screening is essential. Advanced disease can bleed into the eye or grow abnormal vessels. Macular swelling — diabetic macular oedema (DME) — blurs central vision and needs specific treatment. Good glucose, blood pressure and cholesterol control reduce risk.
Diabetes-related damage to retinal blood vessels; screening finds silent disease, and macular swelling (DME) needs targeted treatment.
Floaters and flashes
Clinically reviewedFloaters are drifting spots or threads in vision from changes in the eye's vitreous gel. Brief flashes can occur when the gel tugs on the retina. Long-standing stable floaters are usually harmless. A sudden increase in floaters, new repeated flashes, or a dark curtain across vision needs same-day emergency eye assessment to rule out retinal tear or detachment.
Drifting spots and brief light flashes are common with age; a sudden shower of floaters or a curtain of vision loss is an emergency.
Eye allergies
Clinically reviewedEye allergies (allergic conjunctivitis) cause itchy, red, watery eyes when the eyes react to pollen, dust mites, pet dander or mould. They are common in spring and summer but can occur year-round. Intense itching in both eyes with sneezing suggests allergy rather than infection. Cool compresses, avoiding triggers, and antihistamine or mast-cell stabiliser drops usually help.
Itchy, red, watery eyes from pollen, dust or pets; seasonal peaks in spring and summer respond well to trigger avoidance and allergy drops.
Retinoblastoma
Clinically reviewedRetinoblastoma is a rare cancer that starts in the retina, most often in young children. A white glow in the pupil in photos, a squint, or a red, painful eye can be warning signs. It needs urgent assessment by a specialist — early treatment saves sight and can be life-saving.
A rare childhood eye cancer; a white pupil reflex in photos or a squint needs urgent specialist assessment.
Leukocoria (white pupil reflex)
Clinically reviewedLeukocoria means the pupil looks white or pale instead of dark, often noticed in flash photos of a young child. It can be a sign of retinoblastoma, a serious childhood eye cancer, or other urgent eye problems. Do not wait: seek same-day assessment by a paediatric or eye specialist.
A white or pale pupil reflex in a child, especially in photos, is an emergency that needs same-day specialist assessment.
Red eye
Clinically reviewedA red eye is usually caused by something minor such as conjunctivitis, dry eye or a harmless burst blood vessel. However, a red eye with pain, light sensitivity, or changes in vision needs urgent assessment, as it can occasionally signal a more serious condition.
A red or bloodshot eye; usually harmless, but pain, light sensitivity or vision changes need urgent care.
Browse the library
Jump straight to what you need
Every hub opens with a quick answer, urgency advice where it matters, and links between conditions, symptoms, treatments and practical guides.
Conditions
Eye conditions, explained simply.
Most eye conditions are easier to treat when found early. Use this library to understand what a condition is, how it is diagnosed, and which symptoms should not wait.
SymptomsStart with what you notice.
Some eye symptoms are harmless, but a few are emergencies. Sudden vision loss, a new shower of floaters or flashes, severe pain, or eye injury need same-day medical advice.
Treatments & SurgeryUnderstand your treatment options.
Most common eye procedures are day-case and well established. Understanding what a treatment involves, its benefits, and its risks helps you make a confident, informed decision with your surgeon.
Eye Care & PreventionProtect your vision for the long term.
Regular eye exams, eye protection, managing conditions like diabetes, and not ignoring new symptoms are the most effective ways to protect long-term vision.
About & TrustWho we are and how we keep content trustworthy.
We aim to publish clear, accurate, accessible eye-health information that is reviewed by qualified eye-care professionals and never replaces personal medical advice.
Clinical governance
Designed for qualified eye-surgeon review.
Plain-language draft
Each article starts with the patient question, quick answer, warning signs, and next-step guidance.
Clinical verification
Qualified reviewers check accuracy, missing caveats, urgency advice, and whether claims are appropriately cautious.
Translation review
Translated pages keep the same medical meaning, reading level, metadata, and escalation advice.
Accessibility first
A vision site should be excellent for people with vision needs.
Readable by default
Large text, generous spacing, and short sections support scanning, magnification, and cognitive load.
Keyboard friendly
Visible focus states, skip links, semantic headings, and landmark navigation are part of the base layout.
Contrast conscious
The palette avoids low-contrast pale blues and keeps important actions visually clear.