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Conjunctivitis

This is an educational overview summarizing the definition, causes, symptoms, diagnosis, management, and limitations of the evidence for conjunctivitis.

conjunctivitis · conjunctiva inflammation · conjunctivitis · conjunctivitis (disease) · inflammation of conjunctiva · pink eye

MONDO:0003799Public QA completeSource-bound · 4

Disease at a glance

Start with the essentials, then explore the patient and research views.

Public revision · 7da34ca1bc2e

Disease category
Conjunctivitis is a condition in which inflammation occurs in the conjunctiva, that is, the outer layer of the eye and the inner side of the eyelid, and it is also called 'pink eye'.
Core mechanism
Major related factors include viral or bacterial infections, allergies, irritants, contact lens products, and certain eye drops and ophthalmic ointments.
Main causes · related factors
Depending on the cause, infectious inflammation, allergic reactions, or chemical/physical irritation change the blood vessels and immune response of the conjunctiva, causing symptoms.
Representative patterns
Typical manifestations include eye redness, swelling, itching, burning or foreign body sensation, and discharge.
Individual differences
Infectious conjunctivitis can spread easily between people, and symptoms and course may vary depending on the cause and an individual's exposure to allergies/irritants and lens use.
Diagnosis
It mostly does not significantly affect vision; while infectious conjunctivitis often improves without medical treatment, the course varies depending on the cause and severity.
Management
Diagnosis is made by confirming symptoms, exposure history, lens use, and the possibility of contagion through eye examination, and by differentiating corneal diseases or other ocular diseases if necessary.
Treatment/Research Status
If there is severe pain, marked vision loss, severe photophobia, corneal abnormalities, or lens-related symptoms that make it difficult to diagnose conjunctivitis alone, the possibility of other diseases must also be evaluated.
Read Evidence
Management is tailored to the cause and severity; in infectious cases, measures to reduce transmission, such as hand hygiene and limiting the sharing of personal items, are important.
Key Precautions
Treatment varies by cause; antibiotic eye drops or ophthalmic ointment may be used for bacterial conjunctivitis, whereas viral, allergic, and irritant forms are not treated in the same manner.

For patients and families

A structured guide for understanding the disease and preparing for clinical conversations.

At a Glance

Conjunctivitis is a condition in which inflammation occurs in the conjunctiva, that is, the outer layer of the eye and the inner side of the eyelid, and it is also called 'pink eye'.

Typical manifestations include eye redness, swelling, itching, burning or foreign body sensation, and discharge.

How the disease works

Major related factors include viral or bacterial infections, allergies, irritants, contact lens products, and certain eye drops and ophthalmic ointments.

Depending on the cause, infectious inflammation, allergic reactions, or chemical/physical irritation change the blood vessels and immune response of the conjunctiva, causing symptoms.

Variations in presentation among individuals

Infectious conjunctivitis can spread easily between people, and symptoms and course may vary depending on the cause and an individual's exposure to allergies/irritants and lens use.

The broad framework of diagnosis and management

It mostly does not significantly affect vision; while infectious conjunctivitis often improves without medical treatment, the course varies depending on the cause and severity.

Diagnosis is made by confirming symptoms, exposure history, lens use, and the possibility of contagion through eye examination, and by differentiating corneal diseases or other ocular diseases if necessary.

Current status of treatment

If there is severe pain, marked vision loss, severe photophobia, corneal abnormalities, or lens-related symptoms that make it difficult to diagnose conjunctivitis alone, the possibility of other diseases must also be evaluated.

Management is tailored to the cause and severity; in infectious cases, measures to reduce transmission, such as hand hygiene and limiting the sharing of personal items, are important.

Treatment varies by cause; antibiotic eye drops or ophthalmic ointment may be used for bacterial conjunctivitis, whereas viral, allergic, and irritant forms are not treated in the same manner.

How to read clinical trials

Clinical trial registration only indicates the existence, design, and status of a study and does not demonstrate efficacy, positive results, approval, or standard of care; this data confirms the registration of completed observational studies.

Points to verify during clinical consultations

In clinical practice, it is possible to identify symptom onset and changes, involvement of one or both eyes, discharge, pain and vision changes, contact with infected individuals, exposure to allergens/irritants, contact lens use, and currently used eye drops.

Medical Guidance

This material is for educational purposes and is not intended as a guide for individual diagnosis or treatment. If you have symptoms, please consult a medical professional.

Evidence and sources

A trial registry status does not establish efficacy or regulatory approval.