Pretty sure in TN the only thing ODs CANT inject for medically necessary eye care is anesthetics. So ODs don't remove "lumps and bumps" in TN like they do in KY.
http://www.tn.gov/sos/rules/1045/1045-02.20100620.pdf
Paragraph
1045-02-.12
"...the treatment of conditions or diseases of the eye or eyelid is determined by the board to be those procedures that could be performed in the optometrists office or other health care facilities that would require no more than a topical anesthetic. Laser surgery and radial keratotomy are excluded."
Paragraph
1045-02-.07
" Attaining therapeutic certification must include attaining certification to use pharmaceutical agents by injection."
"No therapeutically certified optometrist shall use pharmaceutical agents by injection
except to counter anaphylaxis until they have received approval from the board. The
board will not approve the use of injections until the optometrist demonstrates to the
board's satisfaction sufficient educational training and/or clinical training, and submits
proof of current certification in cardiopulmonary resuscitation (CPR). The education
must be obtained from board approved courses."
As far as adverse outcomes is concerned, I would imagine that is why very few ODs do them, I'm just arguing that they legally can. The ODs that do them have received extensive training in this, and it wouldn't surprise me if they practiced alongside retina specialists who could potentially also assist in the management of the patient's pathology. I would venture that most ODs don't even do any injections in TN, but legally they are allowed to. Pretty much every MD/DO are legally allowed to do many things they don't do in their practice either.