What are the signs of a contact lens related infection?
The signs to act on are eye pain, light sensitivity, a red eye that is getting worse, discharge, or any reduction in vision in a contact lens wearer. Those need prompt assessment rather than waiting.
- Subject
- Glasses & contacts
- Topic
- Contact lens safety
- Kind of question
- What is…
- Procedures
- Contact lenses
- Last reviewed
- 22 September 2026
This answer explains what the symptom commonly indicates. If it has come on suddenly, or together with pain or loss of vision, seek urgent care rather than waiting for an appointment. This page cannot examine your eye.
In more detail
The practical first step is to remove the lens and keep it, in case it is useful to whoever examines you. Do not put another lens back in that eye.
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Where this answer sits
It is one of 483 answers in the vision and eye health knowledge base, filed under Glasses & contact lenses in Contact lens safety . The subject page carries the answers either side of it, and the hub is searchable.
Subjects this question touches
The pages that answer the subject behind the question, rather than the question itself.
- Condition Glaucoma
- Condition Keratoconus
- Condition Retina and macula conditions
- Condition Diabetic eye disease
- Condition Eye infections, allergies and injuries
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
General answers cannot tell you what is happening in your own eyes. Only an examination by a qualified ophthalmologist can do that.
Sources & further reading
We prefer primary sources. Where a claim comes from a manufacturer, a single study or a regulator, it is labelled as such below.
- EyeSmart: eye health information for the public
Patient-facing material from the largest ophthalmology professional body, covering conditions, tests and treatments outside refractive surgery.
Used for Cross-checking patient-facing explanations of non-refractive eye conditions; Describing what tests such as dilation and OCT involve.
Link checked 23 September 2026