Cataract surgery removes the opaque crystalline lens (cataract) and an artificial lens is implanted inside a sack, replacing the first one.
Over time, the sack containing the artificial lens can become opaque: this causes what is commonly known as secondary cataract.
For the secondary cataract to occur, 1 to 5 years have to pass from the removal of the first cataract. It usually occurs earlier in younger patients.
Secondary cataract can be treated with Yag Laser, that is an outpatient laser treatment: there’s no need for surgery. This process lasts few minutes and the patient starts seeing well just few hours after the Yag Laser treatment.
It may happen to see like small flies moving around after the laser treatment,