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The "Red Eye"
Investigating the cause of a "red eye" can sometimes be a fairly complex process. It is important to first understand that there are numerous and sometimes multiple possible causes of a red eye. In addition, red eyes can range in severity of associated signs and symptoms from very mild/asymptomatic to extremely severe. These conditions can be acute (sudden onset) or chronic (ongoing, sometimes many years) in nature. The appropriate treatment of a red eye depends on its cause. The following are some of the relatively common causes of a red eye:
- Dry Eye
- Blepharitis
- Contact Lens Associated Complications
- Allergic Conjunctivitis
- Bacterial Conjunctivitis
- Viral Conjunctivitis
- Environmental/Toxic
- Medication Induced (e.g., certain over-the-counter eye drops)
- Keratitis (Corneal Inflammation)
- Iritis
- Episcleritis
- Subconjunctival Hemorrhage
- Trauma
- Exposure/Anatomical
The examination of a "red eye" should start with a thorough case history. A physical exam of the eye and associated structures should then be conducted. Usually the cause of a red eye can be determined by a thorough clinical assessment. However, if required, special procedures or lab tests may also need to be arranged. Upon the determination of the cause (or probable cause) of a red eye, the necessary treatment, management, or appropriate referral can then be arranged.
Please select one of the following topics for more information about some of the most common causes of visual impairment or blindness:
Select one of the following topics for more information about other common ocular diseases and conditions:
> Dry Eye and Ocular Surface Disease
