Companions and handbooks are very helpful kinds of sources. They are edited by leading scholars in the particular areas of research, and those editors commission researchers to write individual essays on the subjects which are their areas of interest. As a result, students get a much better understanding of the issues involved in a particular subject area, since the authors go beyond factual summaries to analysis of differing arguments in the field.
For companions and handbooks involving disabilities in Antiquity, see:
"Physically Deformed And Disabled People" by Werner Reiss in The Oxford Handbook of Social Relations in the Roman World (2011)
"Raising a Disabled Child" in The Oxford Handbook of Childhood and Education in the Classical World (2013)
"Disability History and Greco-Roman Antiquity" by C.F. Goodey and M. Lynn Rose in The Oxford History of Disability History (2018)
Part V Healing and the Human Body in A Companion to Science, Technology, and Medicine in Ancient Greece and Rome (2016)
Collections of essays include:
Additional relevant material may be found in the series below when looking by Classical author, literary genre, or topic.
Blackwell Companions - 65 Titles
Brill Companions - 35 Titles
Cambridge Companions - 44 Titles