My mother has acute glaucoma and has lost her right eye due to this, she only has 40% of sight left in her left eye.
The pressure in her eye is not coming down with drops and she is also allergic to every eye drop the hospital have given to her.
The next step is Glaucoma surgery (trabeculectomy) her worry is that she may loose her 40% of sight she has left while getting the surgery. Either way the hospital have told her she is going to loose her sight if she does not take this chance and get the operation.