|Cataract (Hindi: Safed Motia or Motiabind) is age related clouding and increasing opacification of the natural lens of the eye causing blurring of vision. It occurs with the age and starts after 5th decade of life.The symptoms of cataract can vary according to the area of the lens involved and the blurring is early and more pronounced when central part is opacified as compared to the peripheral part of the lens. The other other symptoms may be blurring of vision in sun and in bright light(Glare) , Coloured rings around the lights (Haloes), Multiple blurred images of an object (Polyopia), Blurring of vision in dim light, Difficulty in reading and driving, Repeated quick change in glasses power, eye strain and headache etc.
This clouding of lens can occur due to injury (Traumatic cataract) , Diabetes mellitus and various other diseases and thus can occur earlier also. In new born and infants it occurs due to genetic reasons or poor maternal health and diseases during pregnancy and then is called Congenital Cataract.
Phacoemulsification ( Phaco = lens, emulsification) or phaco as it is popularly called is a technique where the lens is broken into small pieces , emulsified and then aspirated.
|EYE-DROP ANAESTHESIA FOR PHACO
Anaesthetic eye drops are used prior to the procedure to numb the eye. Sometimes a diluted 1% lidocaine is irrigated into the anterior part of the eye to numb the sensitive iris in case the phaco tip touches it.
Since phaco is a short time painless procedure and there is very little handling of the eye, this no-injection eye drop anaesthesia is enough for a total comfort of the patient. One should also remember that eye drop anaesthesia is safer than injection which can cause complications like drug reaction and peforation of the eye.
|THE NO-STITCH PHACO
Phacoemulsification is done with a thin probe which can enter the eye through a 3.2 mm incision. This incision is made in such a manner that a small tunnel is formed with a length of approximately 2.5 mm. The configuration of the tunnel is such that it closes when the eye pressure is increased and so does not need any stitch to keep it closed
THE COLD PHACO
MICRO-INCISION CATARACT SURGERY (MICS)