{"id":1814,"date":"2026-10-20T08:52:43","date_gmt":"2026-10-20T08:52:43","guid":{"rendered":"https:\/\/laseristanbulclinic.com\/eye-glossary\/corneal-erosion\/"},"modified":"2026-10-20T12:56:36","modified_gmt":"2026-10-20T12:56:36","slug":"corneal-erosion","status":"publish","type":"page","link":"https:\/\/laseristanbulclinic.com\/en\/eye-glossary\/corneal-erosion\/","title":{"rendered":"Corneal Erosion: Symptoms, Causes, Treatment and Healing"},"content":{"rendered":"\n
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  1. Home<\/a><\/li>
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  4. Corneal Erosion: Symptoms, Causes, Treatment and Healing<\/span><\/li><\/ol><\/div>\t\t\t

    Corneal Erosion: Symptoms, Causes, Treatment and Healing<\/h1>\n\t\t\t\t\t\t

    Medically reviewed by {{surgeon}}<\/span><\/strong>, {{surgeon’s title and specialty}}<\/span>, on {{review date}}<\/span>. Last updated {{date}}<\/span>.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

    \"Close-up<\/figure><\/div>\n\t\t\t<\/div><\/div>\n<\/section>\n\n\n\n\n
    \n\t\t<\/svg>Definition<\/span>\n\t\t\t

    Corneal erosion<\/strong> (noun)<\/em>: corneal erosion is a break in the thin surface layer of the cornea, the epithelium, which has not stuck down firmly to the tissue beneath it. When it keeps happening it is called recurrent corneal erosion: the surface layer repeatedly loosens, typically during the night or on waking, causing sudden pain, watering and blurred vision. Most cases follow an earlier scratch to the eye or an inherited weakness of the surface layer, and a cornea specialist such as Do\u00e7. Dr. Muhammet Derda \u00d6zer can diagnose it with a short slit-lamp examination.<\/p>\n\t\t<\/div><\/div><\/div><\/div><\/section>\n\n\n\n\n

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    Corneal erosion: key facts<\/h2><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t
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    <\/svg>What it is<\/span><\/dt>
    The surface layer of the cornea (epithelium) does not stay attached to its base layer, so it breaks down or peels away<\/dd><\/dl><\/div>\n\t\t\t\t
    <\/svg>Typical warning sign<\/span><\/dt>
    Sharp pain, a gritty or foreign-body feeling, watering and light sensitivity, often on waking<\/dd><\/dl><\/div>\n\t\t\t\t
    <\/svg>Most common cause<\/span><\/dt>
    A previous injury to the cornea: 45\u201364% of recurrent cases are linked to earlier trauma (EyeWiki, AAO)<\/dd><\/dl><\/div>\n\t\t\t\t
    <\/svg>Second most common cause<\/span><\/dt>
    Corneal dystrophy, mainly epithelial basement membrane dystrophy (EBMD): 19\u201329% of cases<\/dd><\/dl><\/div>\n\t\t\t\t
    <\/svg>Diagnosis<\/span><\/dt>
    Slit-lamp examination with fluorescein dye<\/dd><\/dl><\/div>\n\t\t\t\t
    <\/svg>First-line treatment<\/span><\/dt>
    Preservative-free lubricating drops by day and a lubricating or hypertonic (5% sodium chloride) ointment at night<\/dd><\/dl><\/div>\n\t\t\t\t
    <\/svg>If simple treatment fails<\/span><\/dt>
    Bandage contact lens, anterior stromal puncture, superficial keratectomy or phototherapeutic keratectomy (PTK)<\/dd><\/dl><\/div>\n\t\t\t\t
    <\/svg>ICD-10-CM code (US)<\/span><\/dt>
    H18.831 right eye \u00b7 H18.832 left eye \u00b7 H18.833 both eyes \u00b7 H18.839 unspecified eye<\/dd><\/dl><\/div>\n\t\t\t\t
    <\/svg>Specialist<\/span><\/dt>
    Cornea specialist (ophthalmologist); at Laser Istanbul Clinic, Do\u00e7. Dr. Muhammet Derda \u00d6zer<\/dd><\/dl><\/div>\n\t\t\t<\/div>\n\t\t<\/div><\/div><\/div><\/section>\n\n\n\n\n
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    What is corneal erosion?<\/h2>\n\t\t\t\t

    The cornea is the clear front window of the eye, and its outermost layer is the epithelium, a skin of cells only a few cells thick. In a healthy eye the epithelium is anchored to the layer below it (the basement membrane and Bowman’s layer) by a network of tiny attachments. In corneal erosion those attachments are weak or damaged. The epithelium can then lift, tear or slide off, leaving a raw area that exposes the cornea’s very dense nerve endings. The American Academy of Ophthalmology notes that the cornea has hundreds of times more pain receptors than skin, which is why even a small erosion hurts so much.<\/p>\n

    Doctors describe two patterns. Microform<\/strong> erosions are milder, shorter and more frequent; macroform<\/strong> erosions last for days and typically follow an injury. Either way the typical story is the same: the eye feels fine, you sleep with your eyelids closed, and on waking, as the eyelid peels away from a surface that has stuck to it overnight, the loose epithelium tears. EyeWiki also notes that the lower half of the cornea is the most often affected.<\/p>\n

    Corneal erosion vs corneal abrasion: what is the difference?<\/h3>\n

    An abrasion<\/strong> is the injury: a scratch or scrape on the surface of the cornea, for example from a fingernail, make-up brush, tree branch or eye rubbing. An erosion<\/strong> is what can follow: the repaired surface does not bond properly and breaks down again. When it happens two or more times it is called recurrent corneal erosion.<\/p>

    <\/th>Corneal abrasion<\/th>Corneal erosion (recurrent)<\/th><\/tr><\/thead>
    What it is<\/th>A one-off scratch on the surface<\/td>The surface layer repeatedly loosens or tears from its base<\/td><\/tr>
    Trigger<\/th>A clear injury (fingernail, branch, make-up brush, foreign body)<\/td>Often none: it can start spontaneously, most often on waking, sometimes long after an old injury<\/td><\/tr>
    Typical timeline<\/th>Small abrasions heal in 1\u20132 days; larger ones in about a week (AAO)<\/td>Episodes come and go; the underlying weak attachment can persist for months or years without treatment<\/td><\/tr>
    Treatment<\/th>Drops or ointment, sometimes an antibiotic, and follow-up<\/td>Long-term lubrication first; procedures if episodes keep returning<\/td><\/tr>
    Link<\/th>A corneal abrasion is the most common starting point for recurrent erosion<\/td>May follow an abrasion, or happen in a cornea with a dystrophy<\/td><\/tr><\/tbody><\/table><\/div><\/div>\t<\/div><\/div><\/div><\/section>\n\n\n\n\n
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    Corneal erosion causes: why does it happen?<\/h2><\/div>

    The most common causes and risk factors are:<\/p><\/div><\/div>\t\t

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      Previous corneal injury<\/h3>\n\t\t\t\t\t\t

      Trauma is the most common cause, accounting for 45\u201364% of reported recurrent cases. The injury is often something that scraped the surface, such as a fingernail, paper edge, tree branch or foreign body.<\/p>\n\t\t<\/div><\/li>\n\t\t\t\t

    2. \n\t\t\t\t\t\t

      Corneal dystrophy<\/h3>\n\t\t\t\t\t\t

      Inherited conditions of the cornea are the second most common cause. Epithelial basement membrane dystrophy (EBMD, also called map-dot-fingerprint dystrophy) accounts for 19\u201329% of cases, and some other dystrophies, such as lattice, granular or Fuchs’ endothelial dystrophy, also play a part. EBMD can affect both eyes, and erosions can come on without any injury.<\/p>\n\t\t<\/div><\/li>\n\t\t\t\t

    3. \n\t\t\t\t\t\t

      Dry eye and eyelid conditions<\/h3>\n\t\t\t\t\t\t

      Dry eye, meibomian gland dysfunction (blocked oil glands in the eyelids), ocular rosacea and eyelids that do not close fully during sleep (nocturnal lagophthalmos) all make the surface more fragile.<\/p>\n\t\t<\/div><\/li>\n\t\t\t\t

    4. \n\t\t\t\t\t\t

      Other factors<\/h3>\n\t\t\t\t\t\t

      Previous corneal infection, diabetes, band keratopathy (calcium deposits on the cornea) and badly fitted or poorly maintained contact lenses are also linked to erosion.<\/p>\n\t\t<\/div><\/li>\n\t\t\t<\/ol>\n\t\t

      Because the surface layer takes time to bond firmly to the layer beneath, a cornea can look healed after an abrasion and still be vulnerable for some time afterwards.<\/p><\/div><\/div><\/div><\/div><\/section>\n\n\n\n\n

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      Corneal erosion symptoms: what does it feel like?<\/h2>\n\t\t\t

      The typical corneal erosion symptoms are:<\/p>\n\t\t\t

      Symptom<\/th>Notes<\/th><\/tr><\/thead>
      Sudden pain, often when you wake up or open your eyes<\/th>The classic sign. Pain can range from mild to severe<\/td><\/tr>
      A feeling that something is in your eye<\/th>Gritty, scratchy, foreign-body sensation<\/td><\/tr>
      Watering (tearing)<\/th>Reflex tearing as the nerves are exposed<\/td><\/tr>
      Sensitivity to light (photophobia)<\/th>Many people cannot comfortably keep the eye open in bright light<\/td><\/tr>
      Blurred vision<\/th>Because the surface is uneven; it usually improves as the surface heals<\/td><\/tr>
      Redness<\/th>Common during an episode<\/td><\/tr><\/tbody><\/table><\/div>

      Episodes often settle within hours to days and then return after a gap that may be weeks or months. Symptoms are usually in one eye, though EBMD can affect both. The pattern of pain on waking, in someone who once scratched their eye or has a known dystrophy, is the clue that sends most people to an eye doctor.<\/p><\/div>\t<\/div><\/div><\/div><\/section>\n\n\n\n\n

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      \"Corneal<\/div><\/div>\n\t\t
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      How is corneal erosion diagnosed?<\/h2>\n\t\t\t\t\t\t

      Diagnosis is usually clinical and takes a few minutes:<\/p>\n\t\t\t\t\t\t