I need advice!

Amazon Echo and a subscription to Audible?
That’s what I would want!

Does she like nice scents, either room scents or maybe face/hand cream that smell nice?

A set of silicone drinking straws, a few pretty glasses and some tasty and unusual cordials/syrups juices?

Audible books from Amazon

dragonfly I can't help but wonder - how does one lie face down for two weeks? Will she have one of those beds with a hole in for her face, like a massage bed? Even when I occasionally sleep on my stomach, my head is still turned to one side!

As for what to buy her, what about a face-sizer mirror (on a stand) that can be angled.

... face-sized ...

Apparently it is necessary after some retinal surgery. You can buy special pillows, mirrors and other equipment . If you google it there is advice.

I would second (or third) an Audible subscription. I had several operations for a detached retina. Each time I had to posture for fifty minutes each hour or lie facedown for two weeks just as your friend has to. Audio books were a godsend when I couldn't move or do anything else.

I agree with the audio books but check she doesn’t already have it,

I know it sounds boring, but I feel her main problem will be boredom, and lonely, visits for a chat and a laugh. I assume she has someone to care for her, but I know my mum got a lot from a good friend to brush her hair when she couldn’t or file her nails, it’s those little things that make you feel human, and much more valued than chocolates

I would be careful about buying items which smell nice because that could start her off sneezing.

Instead of chocolates, would she not be better off with practical help?

My mother had to do this. She set up an iPad and watched shows. Audible sounds like a great idea. I think visits would be great too. Some company to break up the monotony.