A 60 years old man who underwent phacoemulsification surgery one year back has come with the complaint of blurring of vision in that eye for the past one month. The defective vision was gradual in onset and it was not associated with pain, redness or watering. He says following surgery, his vision was clear. The most common cause is
Posterior capsular opacification Neovascular glaucoma Chorioretinitis Cystoid macular edema