According to University of Pittsburgh Medical Center (UPMC), medical conditions can affect the colour your eyes appear. While the conditions won’t change the iris or the coloured section of the eye, symptoms of the condition may show on the white part of the eye.
Red eyes: Describe irritated or bloodshot eyes caused by
- Allergies
- Overuse of contact lenses
- Infection
- Eye injury
- Sunburn
- Dry eyes.
Pink eyes: Also known as Conjunctivitis
- One of the most common causes of red eye and eye infections
- Give the white of the eye the red or pink look.
Yellow eyes: Usually a result of more serious health concern
- Cirrhosis
- Sickle cell anemia
- Pancreatic or liver cancer
- Gallstones.
Did you know?
Tears can be divided into three different layers: Lipid layer that comprises oil, aqueous layer that comprises water and mucous layer that comprises mucin.
Basal tears are produced for lubrication, Reflex tears occur when the eye is exposed to a foreign body or irritating gas (like from cut onions) and Psychogenic tears are shed due to emotional reasons. Besides lubricating the eye and flushing away debris, tears also improve the image that forms on the retina by smoothing any irregularities on the surface of the eyeball.