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Living with Pars planitis

An eye condition with swelling in a narrow band inside the eye that can blur vision and cause floaters.

Understanding Pars planitis

Pars planitis is an eye disease that causes swelling in the pars plana, a narrow area between the iris and the choroid.

It can lead to blurred vision, dark floating spots, and gradual vision loss. As it advances, cataracts, retinal detachment, or fluid in the retina (macular edema) may occur. It most often affects young men and usually isn't linked to another disease, but it can occur with conditions such as multiple sclerosis and sarcoidosis.

Signs & symptoms

Symptoms vary from person to person. GARD describes these:

  • Blurred vision
  • Dark floating spots (floaters)
  • Gradual vision loss
  • Cataracts (in advanced cases)
  • Retinal detachment (in advanced cases)
  • Fluid in the retina (macular edema)

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    Autoimmune Association may keep lists of experts for this condition.

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
Expert care
Expert lists: Autoimmune Association
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Autoimmune Association
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
How often should my eyes be checked to protect vision?
Should I be tested for related conditions like multiple sclerosis or sarcoidosis?
What treatments can control the swelling in my eye?

Quick facts

GARD says it is generally idiopathic, which means the cause is not known. It can be linked to autoimmune conditions such as multiple sclerosis and sarcoidosis.

Also known as: inflammation of pars plana of ciliary body; pars plana of ciliary body inflammation; pars plana of ciliary bodyitis; posterior cyclitis

Patient organizations

Source: NIH GARD · Pars planitisGARD ID 7339 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Pars planitis.

Explore the Pars planitis blog

Explore research for Pars planitis

Explore actively recruiting Pars planitis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Pars planitis with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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