Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.
A retinal cyst is a fluid-filled space within the layers of the retina. It is often a descriptive finding on imaging rather than a single disease diagnosis. Cystic spaces can form with macular edema from diabetes, vein occlusion, inflammation, or after eye surgery. Some cystic changes occur in the peripheral retina with aging or in chronic retinal detachment.
read more about retinal cyst ...Many retinal cysts form when the blood-retinal barrier breaks down and fluid leaks into retinal tissue, creating cyst-like spaces. This pattern is common in diabetic macular edema and retinal vein occlusion, and it can also occur with uveitis or after cataract surgery. Traction from the vitreous or an epiretinal membrane can pull on the macula and contribute to cystic change over time. In the far periphery, microcystoid degeneration can be seen with aging and myopia and is often found incidentally. Large retinal macrocysts can also develop in long-standing retinal detachment.
Symptoms depend on cyst location and size. Macular cystic change often causes blurred central vision, distortion, or trouble reading fine print. Colors can look dull, and straight lines can appear wavy when the macula is swollen. Peripheral cystic degeneration often causes no symptoms and is found during a dilated exam. Sudden vision changes, a new dark spot, or a curtain-like shadow can point to a different urgent retinal problem and should be checked right away.
Optical coherence tomography is the main test used to confirm cystic spaces in the retina. It shows the retina in cross-section and measures swelling plus the exact layers involved. A dilated retinal exam helps identify related findings, such as hemorrhages from diabetes or signs of vein occlusion. Fluorescein angiography can be used to look for leakage and areas of poor perfusion when the cause is unclear. Because cysts are often a sign of another condition, diagnosis also includes reviewing systemic risk factors and recent eye procedures.
Treatment targets the underlying cause rather than the cyst itself. When cysts are part of macular edema, retina care often uses injections that reduce leakage and abnormal vessel signaling, and anti-inflammatory therapy can be used in selected situations. Control of blood sugar and blood pressure supports better retinal health over time. If traction is driving cystic change, surgery can be considered when vision is significantly affected and imaging shows pull on the macula. Some peripheral cystic changes are monitored when stable and not linked to tears or detachment.
Cystoid macular edema describes macular swelling where multiple cyst-like spaces form in the central retina. A retinal cyst is a broader phrase that can describe cystic spaces in the macula or elsewhere in the retina. Imaging helps clarify whether the finding is macular edema, peripheral degeneration, or another pattern.
Yes, cystic spaces can shrink or resolve when the underlying cause is treated and swelling improves. Some cystic changes persist when vascular leakage or traction continues. Follow-up imaging tracks response and guides next steps.
No. Cystic change in the macula often affects central vision, but peripheral cystic degeneration can be symptom-free. The impact depends on location, size, and whether swelling is active.
Cystoid Macular Edema. EyeWiki. https://eyewiki.org/Cystoid_Macular_Edema. Date Accessed February 4, 2026.
Cystoid Macular Edema. American Academy of Ophthalmology. https://www.aao.org/eye-health/diseases/cystoid-macular-edema. Date Accessed February 4, 2026.
Cystoid Macular Edema (CME): Causes, Tests & Treatment. Cleveland Clinic. https://my.clevelandclinic.org/health/diseases/14417-cystoid-macular-edema. Date Accessed February 4, 2026.
Cystoid Macular Edema. National Library of Medicine (PMC). https://pmc.ncbi.nlm.nih.gov/articles/PMC2699812/. Date Accessed February 4, 2026.
Macular Edema. StatPearls (NCBI Bookshelf). https://www.ncbi.nlm.nih.gov/books/NBK576396/. Date Accessed February 4, 2026.