pupillary dilation
"I used to wear contact lenses. In a recent eye exam, my optometrist applied 0.5% tropicamide and 0.5% phenylephrine (Myfriin-P) on my eyes. She did not warn me to wear sunglasses after check-up. My eyes exposed to intense sunlight 15 minutes afterwards without sunglasses. Then, I suffered eye pain for almost 2 months now and severe dry eye. 

I read many information afterwards. Corneal permeation of Tropicamide may enhanced by  phenylephrine and may enhanced also its strength. Sun exposure further complicated the harm."