121020
The treatments aim to treat convergence insufficiency & ndash ; for which there is supporting evidence & ndash ; and a range of neurological , educational and spatial difficulties & ndash ; uses which are not supported by good evidence .
 convergence insufficiency
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 convergence insufficiency