Acute conjunctivitis is commonly known as pink eye.

Written by Peng Xi Feng
Ophthalmology
Updated on December 29, 2024
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Acute conjunctivitis, commonly known as pink eye or "fire eye," is more prevalent in spring and summer. It is a seasonal contagious disease, mainly transmitted through contact. Transmission often occurs by touching the secretions from the eyes of an infected person, shaking hands with someone who has pink eye, or by rubbing the eyes with dirty hands. Acute conjunctivitis is highly contagious, and the symptoms of eye irritation are quite severe, including sensations of stinging, burning, foreign body sensation, as well as photophobia, tearing, and purulent discharge. It is essential to seek medical attention promptly and to emphasize isolation and disinfection.

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Written by Peng Xi Feng
Ophthalmology
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Conjunctivitis and Keratitis Differences

Under normal circumstances, bacteria can reside in the conjunctival sac. Infection can occur when the pathogenicity of infecting bacteria is stronger than the host's defense capabilities, or when the host's defense capabilities are compromised. Patients with varying degrees of conjunctival hyperemia and purulent, mucoid, or mucopurulent secretions in the conjunctival sac should be suspected of bacterial conjunctivitis. Keratitis refers to the condition where the cornea's defense capabilities are reduced, and inflammation of the corneal tissue occurs due to external or endogenous pathogenic factors invading the cornea.

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Written by Peng Xi Feng
Ophthalmology
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Does conjunctivitis require isolation?

Infectious conjunctivitis can lead to epidemic infection, therefore it is essential to take preventive measures. Conjunctivitis is often spread through contact, thus it is advocated to frequently wash hands and faces, and avoid wiping eyes with hands or sleeves. Patients with infectious conjunctivitis must be isolated, and any toiletries used by the patients must be isolated and disinfected. Medical staff should also wash and disinfect their hands after examining patients to prevent cross-infection.

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Written by Zhou Qing
Ophthalmology
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Conjunctivitis symptoms

Conjunctivitis is an inflammation that occurs in the thin layer of structure on the surface of the white eyeball and the inner surface of the eyelid. Conjunctivitis can be caused by infections such as bacteria, viruses, chlamydia, fungi, parasites, etc., and by environmental factors like sand, smoke, ultraviolet exposure, and chemical injuries from acids, alkalis, or toxic gases. It can also be an inflammatory response of the conjunctiva due to allergic or systemic diseases including tuberculosis, syphilis, thyroid disorders, or surrounding tissues of the eye such as the cornea, sclera, eyelids, nasal cavity, and sinuses. Common symptoms of conjunctivitis include red eyes, a sensation of a foreign body in the eye, burning, itching, photophobia (sensitivity to light), tearing, and increased discharge. Sometimes it can also cause eye pain.

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Written by Peng Xi Feng
Ophthalmology
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Does conjunctivitis require a dietary restriction?

When we look at our phones and computers for long periods, it can lead to conjunctivitis due to eye strain. Among conjunctivitis cases, allergic conjunctivitis is the most common, especially during the spring and autumn seasons when symptoms like itchy eyes often occur. During such times, it is best to avoid spicy, irritating foods and seafood, as consuming these can exacerbate the itching. Additionally, if it is bacterial conjunctivitis, it is also recommended to limit the intake of spicy and irritating foods.

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Written by Peng Xi Feng
Ophthalmology
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How long does it take for conjunctivitis to heal?

Conjunctivitis can be categorized by the speed of onset into hyperacute, acute or subacute, and chronic. Depending on the severity of the condition, it can be classified as mild, moderate, or severe. Acute conjunctivitis is usually self-limiting, with the condition lasting about two weeks. After treatment with sensitive antibiotics, recovery can occur within a few days. Chronic conjunctivitis is not self-limiting and is more challenging to treat.