The transparent tissue covering the front of the eye is called the cornea. Vision will be greatly affected or lost if the cornea becomes cloudy.The cornea could be affected due to :MalnutritionInjuriesInfectionsBurns, corrosion due to acid / alkali burnsPost operative complication or infectionCongenital disordersSigns and symptomsWatery eyes or mucous / purulent discharge from the eye.Blurred and hazy vision .Redness in the eyes .Dryness.Severe pain in the eyes.PreventionEye should be guarded properly against injuries .Sharp objects must be kept away from reach of children .Any foreign body fall (any dust or any other particle ) in the eye should be removed immediately , if necessary with medical intervention also. If not , it may prove very dangerous to the cornea , if left in the eye itself.Supplementary dose of vitamin A should be provided to children below 6 years of age .Avoid self - Medication. Eye drops of different purposes are available nowadays with contrasting effects.Medication given for one’s eye may prove detremental to the ailment of another person.TreatmentPrompt and effective treatment can prevent corneal blindness in most cases . People with corneal blindness can regain their vision by corneal grafting. Corneal tissue is obtained from a person after death , which is usually called “eye donation” Eye banks harvest the 'cornea' , store them & transplant to patients who have lost their sight due to corneal damage.