Answer:
Margo Spencer was diagnosed with closed-angle glaucoma affecting her left eye. She is scheduled to have a/an peipheral iridotomy , performed to treat this condition.
Step-by-step explanation:
Peripheral iridotomy is a laser treatment which basically treats close angle glaucoma by creating drainage holes in the iris thus helps unblock the canals resulting in extra fluid drain.
It can also be treated by surgical iridotomy (less common)
There are also a number of treatments including medications but the laser treatment is most commonly used in close angle glaucoma.