A cover test is a simple examination used to check how well your eyes work together.
What happens during a cover test
The clinician covers and uncovers each eye while you look at a target. Any movement of the eyes helps reveal a hidden squint or problems with eye alignment.
- You focus on a letter or small picture across the room or up close
- One eye is covered while the other is observed carefully
- The process is repeated on the other eye and then alternating
- The test is painless and safe for adults and children
Why a cover test matters
This test helps explain symptoms such as double vision, eyestrain, or headaches. Early detection of misalignment allows timely treatment and can protect comfortable, clear vision.
- Helps diagnose squints and small eye turns that are not obvious
- Guides decisions about glasses, prisms, or possible surgery
- Useful for monitoring children at risk of lazy eye
- Takes only a few minutes and can be repeated over time
