An instrument using ultrasound to measure the corneal thickness. During refractive surgery used to assess if the cornea is thick enough for the amonunt of sculping necessary.
P (Pachymeter to Pupil)
Technique for removing the crystalline lens by means ultrasonic vibrations which breaks it into pieces small enough to be sucked out.
The use of a laser to seal off tissue by preventing blood entering. Used in the treatment of cancer by depriving the tumour of nourishment. Is also used to treat a detached retina.
Fear of light. Over sensitivity to light leading to discomfort often accompanied by an excessive amount of tears.
A cataract operation consists of the removal of the crystalline lens situated in the front of the lens capsule leaving the rear or posterior intact. However, this can sometimes become cloudy and therefore requires the cutting of a visual pathway by means of a laser.
Age related loss of reading vision due to the inability of the crystalline lens to change its shape to focus on a near object.
Sagging of the upper eyelid caused by a defective muscle. Is often hereditary.
The black opening in the centre of the iris through which light travels to the back of the eye (retina) via the crystalline lens.