Eye health guide
Get to know your eyes across 55 topics: how we see, common conditions, how to protect your eyes and when to see a doctor.
Eyes and vision
- How Vision Works: From Light Entering the Eye to Seeing in the BrainA plain-language tour of how we see: how the eye focuses light, how rods and cones turn it into nerve signals, and how the brain builds colour, depth and motion.
- Anatomy of the Eye: A Clear Guide to Every Part and What It DoesA structure-by-structure guide to the human eye, from the cornea and lens to the retina, optic nerve, eyelids, tear glands and the six muscles that move each eye.
- Eye Colour and Genetics: Why Eyes Are Brown, Blue, Green or GreyWhat really decides eye colour: melanin, light scattering and many genes working together. Plus why babies' eyes change, what heterochromia is and when a colour change needs a doctor.
- Fascinating Facts About the Eyes (and the Science Behind Them)Surprising, evidence-checked facts about human eyes: blinking, the blind spot, eye megapixels, the fastest muscles, types of tears and how animal vision compares to ours.
Refractive errors
- Refractive Errors Explained: Myopia, Hyperopia, Astigmatism and MoreThe most common reason for blurry vision is a refractive error. Learn how myopia, hyperopia, astigmatism, presbyopia and anisometropia differ, how they are measured and how they are corrected.
- Myopia (Nearsightedness): Causes, Progression and Myopia ControlMyopia makes distant objects blurry and is rising fast worldwide. Learn why it develops, why it matters for children, and which treatments genuinely slow its progression.
- Hyperopia (Farsightedness): Symptoms, Children's Eyes and TreatmentHyperopia makes the eye work harder to focus, especially up close. Learn how it differs from presbyopia, why it matters in children, and how it is corrected.
- Astigmatism: Causes, Symptoms, Prescription and Treatment OptionsAstigmatism blurs and distorts vision at all distances because the eye's optics are unevenly curved. Learn how it is measured, corrected and when it may signal keratoconus.
- Presbyopia: Why Near Vision Changes After 40 and What HelpsPresbyopia is the natural loss of near focusing that starts in our 40s. Learn why it happens and compare reading glasses, progressives, contacts, drops and surgery.
Conditions
- Eye Diseases Guide: Common Eye Conditions Grouped by SymptomA symptom-based map of the most important eye conditions, from cataract and glaucoma to dry eye and retinal detachment, with links to detailed guides and clear red flags.
- Cataract: Symptoms, Types, Surgery and Recovery ExplainedA cataract is a clouding of the eye's natural lens. Learn how it develops, how it is diagnosed, how modern surgery and lens implants work, and what recovery really looks like.
- Glaucoma: Types, Silent Symptoms, Screening and TreatmentGlaucoma damages the optic nerve, often silently and without pain. Learn the main types, why eye pressure matters, who should be screened and how drops, laser and surgery protect sight.
- Age-Related Macular Degeneration (AMD): Dry, Wet and TreatmentAMD affects the macula, the part of the retina used for reading and recognising faces. Learn the difference between dry and wet AMD, current treatments, AREDS2 supplements and how to monitor at home.
- Diabetic Retinopathy: Stages, Screening and Treatment OptionsDiabetes can damage the tiny blood vessels of the retina long before vision changes. Learn the stages of diabetic retinopathy, how often to be screened and which treatments protect sight.
- Dry Eye Disease: Causes, Symptoms and a Step-by-Step Treatment PlanDry eye is one of the most common reasons people see an eye doctor. Learn the two main types, what causes them and how treatment builds step by step from tears and lid care to prescription options.
- Conjunctivitis (Pink Eye): Types, Contagiousness and TreatmentConjunctivitis, or pink eye, is usually mild but can be contagious. Learn how to tell viral, bacterial and allergic types apart, how to stop it spreading and when a red eye needs urgent care.
- Eye Allergies: Itchy Eyes, Allergic Conjunctivitis and ReliefItchy, watery, red eyes are often caused by allergy. Learn the different forms of allergic eye disease, which drops work best, how to reduce exposure and why eye rubbing can harm the cornea.
- Stye vs Chalazion: Differences, Home Care and When to Get HelpStyes and chalazia are common eyelid lumps. Learn how they differ, how warm compresses and lid hygiene help, why squeezing is risky, when drainage is needed and how to prevent recurrences.
- Blepharitis: Causes, Demodex, Lid Hygiene and Long-Term CareBlepharitis is a common, chronic inflammation of the eyelid margins. Learn the types, the role of Demodex mites and oil gland problems, and a practical lid hygiene routine that keeps symptoms under control.
- Uveitis: Types, Causes, Warning Signs and TreatmentUveitis is inflammation inside the eye that can threaten sight if untreated. Learn the types, the link with autoimmune conditions such as HLA-B27 diseases, the warning symptoms and how it is treated.
- Retinal Detachment: Warning Signs, Types and Emergency TreatmentA sudden shower of floaters, flashing lights or a shadow spreading across your vision can mean a detached retina. Here is what happens, who is at risk and why same-day care matters.
- Eye Floaters and Flashes: Harmless Ageing or a Warning Sign?Most floaters are harmless shadows cast by ageing vitreous gel, but a sudden shower with flashes can signal a retinal tear. Learn the difference and the honest facts about treatment.
- Keratoconus: Symptoms, Progression, Cross-Linking and LensesKeratoconus makes the cornea thin and cone-shaped, blurring and distorting vision. Early diagnosis and corneal cross-linking can halt progression, and special lenses restore clear sight.
- Strabismus and Amblyopia (Lazy Eye): Signs, Treatment, OptionsA turned eye or a weak lazy eye is very treatable when caught early. Learn the types, how glasses, patching, atropine and surgery work, and what is possible for teenagers and adults.
- Colour Blindness: Types, Causes, Tests and Daily Life TipsAround 1 in 12 men and 1 in 200 women see colours differently. Learn the types of colour vision deficiency, how it is inherited and tested, and what really helps in daily life.
- Night Blindness (Nyctalopia): Causes, Tests and Night DrivingNight blindness is a symptom, not a disease. Discover why seeing in dim light gets harder, which causes are easily fixed, which need a specialist, and how to stay safe driving at night.
- Pterygium and Pinguecula: Causes, Symptoms and Surgery OptionsA yellowish bump or a fleshy wedge growing onto the clear front of the eye is usually pinguecula or pterygium, both linked to sun and dust. Learn the symptoms, home care and surgical options.
- Droopy Eyelid (Ptosis): Causes, Red Flags and TreatmentA drooping upper eyelid is usually caused by a stretched lid muscle tendon with age, but it can also signal nerve or muscle disease. Learn the causes, warning signs and treatment options.
- Nystagmus: Infantile and Acquired Types, Causes and ManagementNystagmus is an involuntary, repetitive movement of the eyes. Learn how infantile and acquired forms differ, what the null point is, and how glasses, low-vision aids and treatments help.
- Ocular Migraine and Visual Aura: Symptoms, Triggers, Red FlagsShimmering zigzags or a spreading blind spot are usually migraine aura, but sudden vision loss in one eye can signal a mini-stroke. Learn the differences, triggers and warning signs.
- Optic Neuritis: Painful Vision Loss, MS Link and RecoveryOptic neuritis is inflammation of the optic nerve that causes painful vision loss, usually in one eye. Most people recover well, but it can be the first sign of multiple sclerosis.
- Retinitis Pigmentosa: Symptoms, Genetics and Treatment OptionsRetinitis pigmentosa is a group of inherited retinal conditions that cause night blindness and gradually narrowing side vision. Here is what it means, how it is diagnosed and what support exists.
- Thyroid Eye Disease: Bulging Eyes, Double Vision and TreatmentThyroid eye disease, or Graves orbitopathy, is an autoimmune condition that inflames the tissues around the eyes. Learn the symptoms, risk factors and modern treatment options.
- Eye Tumours: Retinoblastoma, Melanoma, Eyelid Cancer and NeviEye tumours are rare, but recognising the warning signs, from a white pupil in a child's photo to a changing eyelid lump, can save sight and life. Here is what you should know.
- Corneal Ulcers and Serious Eye Infections: Signs and UrgencyMost red eyes are harmless, but infections of the cornea and deeper eye can threaten sight within days. Learn the types, the contact lens connection and when to seek urgent care.
- Corneal Transplant and Eye Donation: Types, Recovery, RejectionA corneal transplant replaces damaged corneal tissue with healthy tissue from a donor. Learn about the different techniques, recovery, rejection warning signs and how eye donation works.
Lifestyle & protection
- Nutrition for Eye Health: Nutrients, Foods and Supplement FactsWhat you eat influences your eye health over a lifetime. Learn which nutrients matter, which foods deliver them, who benefits from supplements and which popular claims are myths.
- Digital Eye Strain: Symptoms, Causes and Practical ReliefDigital eye strain causes tired, dry and blurry eyes after screen use. Learn why it happens and the practical changes, from the 20-20-20 rule to better lighting, that bring real relief.
- Sleep and Eye Health: How Rest Protects Your VisionSleep is when your eyes recover. Learn why poor sleep leaves eyes dry and sore, how sleep apnoea is linked to eye disease, and practical steps for restful nights and comfortable mornings.
- Daylight and Natural Vision: Myopia, Body Clock and UV BalanceNatural daylight helps protect children against myopia and keeps your body clock in time, but too much UV harms the eyes. Learn how to get the balance right, indoors and out.
- Eye Drops: Types, Uses and How to Put Them In CorrectlyA practical guide to the main types of eye drops, which ones need a prescription, why steroid drops are risky without supervision, and how to use any drop correctly.
- Stress and Your Eyes: Twitching, Dry Eye, CSC and What HelpsStress can make eyelids twitch, eyes feel dry and heads ache, and in some people it is linked to fluid under the retina. Learn what is normal, what is not and what helps.
- Everyday Eye Care Tips: A Practical Checklist for Healthy EyesSimple daily habits protect your sight for decades. This checklist covers eye protection, hygiene, screens, sunlight, food, lifestyle and regular eye examinations.
- Eye Safety at Work, at Home and in Sports: Protect Your SightMost eye injuries are preventable. Learn which protective eyewear standards to look for, how to handle chemical and workplace hazards, DIY safety and which sports carry the most risk.
- Medications That Affect the Eyes: Side Effects You Should KnowMany common medicines can affect the eyes, from dryness to glaucoma and retinal damage. Learn which drugs matter, what screening is recommended and which symptoms need urgent care.
Life stages
- Eye Health in Children: Milestones, Screening and Warning SignsHow children's vision develops, when to have their eyes checked, the most common eye problems, warning signs parents should know, and how screens and outdoor play affect young eyes.
- Eye Care by Age: What to Check From Newborn to 80 and BeyondYour eyes change throughout life. This decade-by-decade guide explains typical changes, common conditions and which eye checks matter at each age, from birth to 80 and beyond.
- Eyes During Pregnancy: Normal Changes and Warning SignsPregnancy can change your vision, tears and contact lens comfort. Learn which changes are normal, which visual symptoms signal pre-eclampsia, and how to manage eye conditions safely.
- Eye Care by Profession: Practical Advice for Every Kind of WorkDifferent jobs put different demands on your eyes. Learn the main risks and practical protection tips for office work, driving, healthcare, construction, aviation, kitchens, outdoor work and gaming.
- Low Vision and Visual Impairment: Rehabilitation, Aids and SupportLiving with low vision is easier with the right help. Learn what low vision means, how rehabilitation works, which magnifiers and digital tools help, and how to adapt your home.
Exams & treatment
- Eye Examinations Explained: What Happens and Why It MattersA step-by-step guide to the comprehensive eye exam: the professionals involved, what every test measures, how to prepare and how often you should go.
- Eye Surgery Options: Laser, Lens, Cataract, Glaucoma and RetinaAn honest overview of modern eye surgery, from laser correction and implantable lenses to cataract, glaucoma and retinal procedures, with candidacy and risks.
Emergencies & facts
- Eye Emergencies and First Aid: What to Do in the First MinutesClear first-aid steps for chemical splashes, foreign bodies, blows and cuts to the eye, plus the warning signs of sudden vision loss that need same-day care.
- Eye Myths and Facts: 24 Common Beliefs Checked Against the EvidenceFrom carrots and crossed eyes to screens, glasses and eye exercises: 24 popular beliefs about vision examined against current scientific evidence.
- Eye Health FAQ: Clear Answers to the Most Common QuestionsShort, evidence-based answers to the questions people ask most about eye exercises, glasses, contact lenses, eye tests, screens and children's vision.