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A subretinal abscess is a pocket of infection and inflammation located under the retina. It can develop when bacteria or fungi spread to the back of the eye and form a localized focus of infection. Vision can drop quickly if the abscess involves the macula or triggers widespread retinal inflammation. This is a serious condition that needs rapid specialist care to protect the retina.
read more about subretinal abscess ...Subretinal abscesses often occur from endogenous spread, where an organism travels through the bloodstream and seeds the eye. Risk rises in people with weakened immune systems, uncontrolled diabetes, IV drug use, or recent systemic infection. Both bacteria and fungi can be involved, and the likely organism depends on the patient's medical context and exposure history. In some cases, the infection follows eye surgery or penetrating injury, though this is less common than bloodstream spread. Identifying the source infection is important because eye treatment and systemic treatment must work together.
Blurred vision or a sudden blind spot can occur when the infected area affects the central retina. Floaters are common because inflammation can spill into the vitreous and cloud the visual pathway. Some people have eye pain, redness, or light sensitivity, though deep posterior infections can start with minimal surface redness. Symptoms can worsen quickly over days, especially when the infection is aggressive. Fever or systemic illness symptoms can occur at the same time, so full-body symptoms should be reported.
A retina specialist performs a dilated exam to look for a focal subretinal lesion with surrounding inflammation. Optical coherence tomography (OCT) helps confirm the lesion's location and shows whether fluid or retinal disruption is present. Ultrasound can help when the view is limited by vitreous haze or bleeding. Blood cultures and systemic testing are often needed to identify the organism and locate the primary infection source. In selected cases, vitreous or aqueous sampling can support targeted therapy when the diagnosis is uncertain.
Treatment usually includes systemic antimicrobial therapy guided by suspected organisms and culture results when available. Intravitreal injections deliver medicine directly into the eye and are commonly used when sight-threatening posterior infection is present. Vitrectomy can be considered when vitreous inflammation is dense, when sampling is needed, or when the eye is not responding to initial therapy. Care also focuses on finding and treating the systemic infection source to prevent reinfection. Close monitoring is needed because scarring, retinal detachment, or permanent retinal damage can occur.
Yes. Infection under the retina can damage photoreceptors and leave permanent scarring. Early treatment lowers the chance of severe vision loss and reduces the risk of complications like retinal detachment. Rapid evaluation is especially important when vision changes happen over hours to days. Emergency referral to a retina specialist is often appropriate.
Yes. Some posterior infections start with blurred vision and floaters without intense pain or redness. Pain can still develop as inflammation increases. Because symptoms can be subtle early, sudden new floaters or a blind spot should be checked quickly. Medical history and exam findings help confirm urgency.
Scarring under the retina can permanently reduce vision, especially when the macula is involved. Inflammation can spread and lead to endophthalmitis, which can worsen the outcome. Retinal detachment can occur if tissue becomes weak or traction develops. Prompt treatment and close follow-up help reduce these risks.
Subretinal Abscess. EyeWiki. https://eyewiki.org/Subretinal_Abscess. Date Accessed February 4, 2026.
Management of subretinal abscess. PubMed Central (PMC). https://pmc.ncbi.nlm.nih.gov/articles/PMC9681964/. Date Accessed February 4, 2026.
Endogenous Endophthalmitis. EyeWiki. https://eyewiki.org/Endogenous_Endophthalmitis. Date Accessed February 4, 2026.
Endophthalmitis. EyeWiki. https://eyewiki.org/Endophthalmitis. Date Accessed February 4, 2026.
Endogenous Endophthalmitis. StatPearls (NCBI Bookshelf). https://www.ncbi.nlm.nih.gov/books/NBK574594/. Date Accessed February 4, 2026.