Vision question. Reading is difficult and not enjoyable, reading a word at a time is fine. Is this the brain instead of vision?

While it could be cognitive decline it could also at least partially be that learning to function with monocular vision makes things difficult and sucks the joy out of attempting to read. My mom had vision loss due to macular degeneration with one eye having only 10% of her visual field remaining. Although she was prescribed magnifiers that allowed her to read in the optometrist's that never translated into being of any real use at home, it was just too much effort to make it worthwhile for anything but the most basic needs.

Weeroo I know just what she means that it is no fun to read.
For me I almost do not know how to describe it. Exhausting might be a word but it is not just that, it is not knowing why the glasses are not "right" I fool with them I move them up my nose, down, a bit in a bit out I have trifocals and I try to look through each to see if it is any better and it just isn't.
And I was never a fan of audio books because the person that reads the book never seems to be the voice that I would hear in my head as I was reading if that makes any sense. But Audio books is better than nothing.
Please tell your mom at least 1 person understands what she is talking about!

My mother, who was a avid reader, gradually lost her ability to read as her dementia progressed. At first, she was saying that her eyes got tired, but I felt that it was more a cognitive issue. We have stopped going for eye checkups because she wasn't understanding what she should do with the eye charts and exams. Eventually she stopped wearing her glasses. She seems to be OK without them, as she is accompanied everywhere.

I agree with those who say it is likely a cognition problem. My mother in law was an avid reader. When she got macular degeneration, we tried audiobooks for her. They were given as gifts and she did not seem to ever listen to them although she thanks us graciously. But then we realized that she could no longer go to movies because she could not follow the story. She said she could not hear and she did have hearing problems but when she said she could not hear, it seemed to be more than that; we realized she could not really comprehend what she was hearing. She had trouble with seeing/reading and gradually just stopped reading all together. She would still watch Jeopardy but could not follow other TV shows. So if your mother is only complaining about reading, and she can watch TV/movies and follow the story, then it might truly be just her eyes. But if you are seeing other issues with comprehension of other types of input, it might be more than that. Perhaps you can get her to go for testing with the explanation that the testing might help correct her reading difficult by having a greater understand of her condition? If it is dementia, then new glasses won't help but at least you won't go crazy trying to fix her eyes when it is another problem.

Its probably the Dementia. My Mom could do the same thing, read signs, but could not read a book. The brain no longer works well.

My Mom had Macular Degeneration in both eyes and she had similar complaints: "New glasses didn't help her see better." "Can only read one or two words at a time even with 3X or 4X or 5X magifying glasses and large print magazines or books"...and so forth.

I agree with cwillie--My Mom found that learning to function with limited vision was difficult and time-consuming and that it sucked all of the joy out of attempting to read. 

The main reason that I lived with Mom was to assist her with reading bills, writing checks, and managing the farmland AND taking Mom to doctor appointments, church and visiting friends. Mom had to sit at an angle and use her peripheral vision to watch TV. Basically I became Mom's eyes and ears (and secretary) so that she could live in her own home for 9+ years until she got so depressed that she refused to perform any ADLs and needed more assistance than what I could provide at home.

Unfortunately Mom's vision was not ever going to get better--and she knew that--but it did not stop her from complaining about not being able to read or watch TV. I provided emotional support and just kept trying different magifying glasses just to show Mom that I cared and that I was willing to "try anything" to help her see better.

When a person has dementia, they gradually have difficulty with cognitive processing - which includes reading.

So, to answer your question - yes, it could be her "brain" rather than her eyes.

As an example, my father had a stroke which resulted in the loss of vision in one eye. The "eye" was working fine, but the "brain" was not receiving the information from the eye because the stroke had damaged the optic nerve - so he was permanently blind in that eye.

Perhaps it is a comprehension problem, not a vision problem?

Can she follow the plot of a TV show? Does she listen to audiobooks and enjoy those?

This struck a chord with me.
I had a Macular Hole about 18 months ago. I should say I was diagnosed with it. I had not noticed a problem with my vision until one day the Guide on the TV looked odd. Anyway long story short the Macular Hole was repaired and that particular surgery causes a cataract so that was corrected about 6 months after the initial surgery. I have had my eyes examined, I have new glasses but they just do not seem "right" and I can not explain it. I used to enjoy reading no longer....
Have you considered Audio Books? Would she enjoy those?
So in your moms case it could be vision. It could be that she is having difficulty processing the words. When she does read does she comprehend the words. Being able to read and say a word does not necessarily mean she can comprehend it.

Get a good evaluation from an opthamologist. If there are eye illnesses, a low vision specialist could prescribe devices that may do more to help your mom use the vision she has. If the issue is dementia, then it may be a cognitive issue. Vision processing in the brain involves almost the whole brain. Dementia always involves two or more parts of the brain. Our field of vision is actually two parts. The central part is where we process vision and color and details. The peripheral vision is what we see to the sides of that. It is mostly held in memory! About 15 seconds of memory is needed for the brain to keep an ongoing image of the periphery intact. That's a lot of memory for an aging brain and even more so if dementia is present. Central vision is very small. Hold a nickel at arms' length and that is about the amount that the brain is processing at one time. The rest is held in memory. As dementia progresses, as long as there is not some illness in the eye, the brain holds less and less peripheral memory and only what is being processed at the moment is what is perceived. Teepa Snow has good videos about this (teepasnow.com). She says that what starts out like a swim mask, goes to binocular to monocular vision at the end. Reading becomes impossible. Objects and faces should be placed directly in that persons line of sight to be seen. Double check with the person to make sure they have seen what you want them to see. This is tough. An Occupational Therapist may be able to help you and your mom adapt so that it is not so frustrating.