After the squint surgery, you may have many side effects, including the blurred vision. It is normal and temporary. You need to have the good rest for the eyes. Then you could also use the eye drops to get the clear eye sight. You could even use the warm compress to make the eyes feel comfortable. After few days of good protection for eyes if you still have the blurry vision, you need to go to see the check on the eyes.
Squint surgery could help correct the misalignment of one eye or both eyes deviating inwards or outwards (strabismus). If it is significant, then a surgery is recommended to have it corrected. There are some side effects with the squint surgery as any other surgeries do. Blurry vision and double vision of first a few days are quite common symptoms, which most patients might experience. Don't worry too much. However if your blurry vision persist, then you need to contact with your doctor to see if any further management needed.