Ans: Misalignment (deviation) of two eyes. It can be constant (present all the time) or intermittent.
Ans: Loss of coordination between the muscle of the two eyes leads to misalignment .Other causes are refractive errors, paralysis and trauma.
Ans: When both eyes see a object simultaneously from a slight different angle, they are fused by brain to form a single 3D image, possible with straight eyes only.
Ans: Mild squint during initial 3-4 weeks of life is common if deviation present after 1 month it should be checked deviation can start at 6 month – 2 years of age or it can be first evident in adult also.
- Preserve / restore vision.
- Straightening of eyes.
- Restore 3D Vision.
Ans: Earlier the better!!
- In childhood early treatments improves / restore vision & 3D vision.
- In adults & in late cases Amblyopia(LAZY EYE) develops where visual recovery is not guaranteed, surgery will depend on patient’s need and will be only for cosmetic correction.
- Patching Therapy & Muscle Exercise.
Ans: Glasses are helpful in children and frequent follow up is required, glasses cannot replace the need of surgery (if needed).
Ans: Patching therapy is to increase the vision of amblyopic “LAZY” eye. Patching can straighten eye in few types of squint only but yes increased vision can improve the surgical outcome.
Ans: Squint surgery is performed of extra ocular muscle (6 in each eye). Surgery can be performed on both the eyes simultaneously depending on type of squint and amount of deviation.
Ans: In children upto 12–14 years, general anaesthesia is required. After 14 years surgery can be completed in local anaesthesia.
Ans: Absorbable sutures are used which are rarely required to be removed, they dissolve.
Ans: Over correction, under correction,
In very rare cases : globe perforation leading to Endophthalmitis & RD (rare 1:3500 surgery).
Ans: Success rate depends on type of squint, time of squint surgery and vision. It ranges from 60–70 % to 100%