Understanding Lab Tests for Retinitis
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Retinitis is inflammation of the retina, the light-sensitive tissue at the back of the eye. While the diagnosis of retinitis is typically made through eye examinations and imaging, blood tests play a crucial role in identifying underlying infections that can cause this serious condition.
Recommended Test
Cytomegalovirus (CMV) Antibodies, IgG
This test detects antibodies against cytomegalovirus (CMV), a common virus that can cause serious complications in immunocompromised individuals. In people with weakened immune systems, such as those with HIV/AIDS, CMV infection can lead to retinitis, a sight-threatening condition. High levels of CMV IgG antibodies may indicate a past or current CMV infection that could potentially progress to retinitis, making this test valuable for risk assessment and monitoring.
2907 reviews
The Role of Blood Testing in Retinitis
There is no single blood test to diagnose retinitis itself, as it is primarily an eye condition diagnosed through ophthalmologic examination. However, blood testing is fundamental for identifying infectious causes, particularly in people with compromised immune systems who are at higher risk for infection-related retinitis.
Testing for Infectious Causes
Various infections can lead to retinitis, especially in immunocompromised individuals. Identifying these underlying infections through blood tests is essential for proper treatment and preventing vision loss.
Who Should Consider Testing
CMV antibody testing is particularly important for individuals with compromised immune systems, including those with HIV/AIDS, organ transplant recipients, or patients receiving immunosuppressive therapy. Early detection of CMV infection can help prevent progression to serious complications like retinitis.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment. If you experience vision changes or eye symptoms, seek immediate medical attention from an eye care professional.
