the eyesight fluctuates quite a lot. When she is relaxed, she can see quite good and doesn't need glasses. When she is stressed or doing something that encourages her to use bad vision habits, then she wouldn't see 20/40, she would see much worse, and in those cases she would use -5 glasses. However, that is much better than the -8 glasses she started with.
First, one learns to improve the vision under favorable conditions. The eye will see well during these times but worse at other less favourable times.
Second one learns to extend the proper use of the eyes to unfavorable conditions.
Once this is achieved, then the eyesight improvement is permanent.
Most people get some temporary improvement, then get frustrated that the eyesight fluctuates a lot, and then give up. It takes patience and persistence to achieve a permanent level of improvement. Read the latest success story by Bob, he is a good example of persistence.


Perhaps you are searching for someone that has had a similar starting prescription and are looking for hope in their success story? You will happen across this story as you find more and more information about the Bates method. Teacher's websites are a good place to look, as are Bates's magazines. Write down your own successes in a small notebook, and look back on your own success for inspiration to get even further.