Why shouldn’t optometrists have prescriptive authority similar to that of physicians?

Texas optometrists may prescribe some eye drops and medications for a limited number of days, because if today’s powerful medications are not working in this limited time frame, something more may be going on with the patient’s health that requires diagnosis and treatment from a physician. Unlike optometrist training, ophthalmology training combined with medical school covers this in detail. If optometrists were permitted to apply stronger medications for longer intervals, the medications might mask symptoms of larger issues and potentially cause more harm than good.