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Photo Therapeutic Keratectomy-PTK Laser eye surgery. PTK is a surgical procedure which is mainly used to treat scars on the cornea and any other type of corneal surface disease.These include corneal dystrophy and epithelial erosion syndrome.he aim of this procedure is to treat surface level corneal disease and NOT to remove the need to wear glasses or contact lenses. However, this treatment can be combined with PRK which means that it has both a medical and cosmetic application.
Answer: 'AFK' is 'Away from Keyboard'. AFK is used in live chatting to advise people that you will not be responding for the few minutes as you will be away from the computer. AFK is commonly used with a descriptor like afk bio (you are going to the washroom), or afk phone (you are answering a phone call). AFK is a very common expression. AFK can be used in both uppercase and lowercase form. Just remember: typing entire sentences in uppercase is considered rude shouting.