Cornea
Cornea
The cornea is the clear tissue at the front and center of the eye. Its transparency permits light to pass in to the eye.it helps protect the eye from infection and foreign material.
What are the different types of corneal disease
Infection
- Bacterial
- Fungal or Viral keratitis
Trauma
- Abrasions or exposure to toxic chemicals
Nutritional deficiency
- Vit. A deficiency
Allergies
- Vernal and atopic keratoconjunctivitis
Growth
- Ptergiyum or benign or malignant cancerous growth on the eye’s surface
Ectasia(thinning)
- Keratoconus or thinning of cornea following refractive laser surgery
- The cornea can also be damaged secondarily by other common eye conditions such as; dry eye , eye lid disorders , glaucoma
Keratoconus
Keratoconus is a disorder of the eye which results in progressive thinning of cornea
Causes
Exact causes are unknown. It is believed to occur due to genetic, environmental and hormonal factors
Symptoms
Blurring of vision
Light sensitivity
Near sightedness
Treatment
Glass
Contact lens (RGP lens)
Surgery (C3R-corneal collagen cross linking)
Diagnosis
Visual acuity
Retinoscopy
Opthalmoscopy
Corneal topography
Dry eye
Dry eye occurs the eye does not produce tears properly, or when the tears are not of the correct consistency and evaporate too quickly
Symptoms
Burning of the eye
Foreign body sensation
Pain and redness of the eye
Blurring of vision
Causes
Ageing
Changes in the hormone
Exposure to sun, wind or dry climate
Contact lens over time use
Eye injury
Rheumatoid arthritis
Treatment
Treatment depends on sensitivity. Lubricating eye drops can be given
Pterygium
Pterygium is a growth of the conjunctiva that occurs the white part opf your eye over conjunctiva
Causes
Exact causes are unknown. Certain elements causes higher risk of developing this condition are UV radiation, pollen,sand,smoke and wind
Symptoms
Redness
Blurring of vision
Foreign body sensation
Itching
Treatment
Medication
Surgery