How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dr. Chan Your Own Question
Dr. Chan
Dr. Chan, Ophthalmologist
Category: Eye
Satisfied Customers: 356
Experience:  Board Certified in ophthalmology
Type Your Eye Question Here...
Dr. Chan is online now
A new question is answered every 9 seconds

I was standing, talking to someone a few days ago when a

Customer Question

i was standing, talking to someone a few days ago when a shadow blocked the top 1/2 of my sight. It went away in a few minutes, and has not happened again.   I had a retinal detachment a few years ago, that was successfully fixed, and the doctor did surgery on the other eye to keep it from detaching.   What's going on?
Submitted: 8 years ago.
Category: Eye
Expert:  Dr. Chan replied 8 years ago.


What is your age? What medical conditions do you have?

Customer: replied 8 years ago.
54 yrs old, no medical conditions, i have had cataract surgery about 5 years ago.
Expert:  Dr. Chan replied 8 years ago.


There are 3 possibilities.

One is the retina. Even though you have had surgery in one eye and prophylactic laser in the other, the retina can still detach. Shadows coming over vision is one sign of a detachment.

Another is just floaters. The gel in the eye can break up and float around.

Finally, and the most concerning, is amaurosis. This occurs when a blood clot drifts up and temporarily occludes the artery to your eye. This is similar to a TIA. It is concerning because there could be other clots and bigger ones that can cause more serious problems (like a stroke).

I think you need to see an ophthalmologist to make sure the retinas are OK. You may also need to get a carotid ultrasound (to look for clots in the arteries in your neck) and a lipid profile (to look at the cholesterol level).

Hope this helps and thank you.

Dr. Chan and other Eye Specialists are ready to help you
Customer: replied 8 years ago.
Thank you very much. I think I will take your advice.
Expert:  Dr. Chan replied 8 years ago.
You are welcome. Good luck.