Both adrenergics and cholinergics may cause blurred vision because:they both can affect pupil…

➤ When should I seek medical help for drug-induced blurred vision?
Seek urgent care if blurred vision is sudden, severe, accompanied by eye pain, halos, nausea, or rapid loss of vision. Mydriatic-induced angle-closure glaucoma is an emergency. Also consult your prescriber if blurring persists beyond expected drug effect, or if you have known narrow anterior chamber angles or ocular hypertension.