The word “astigmatism” is used so much in the optometric world that most people have talked about it when discussing their eye health with their doctor.

“Astigmatism” comes from the Greek “a” - meaning “without” - and “stigma” - meaning “a point.” In technical ocular terms, astigmatism means that instead of there being one point of focus in the eye, there are two. In other words, light merges not on to a singular point, but on two different points.

This is experienced in the real world by blurred, hazy vision, and can sometimes lead to eye strain or headaches if not corrected with either glasses or contact lenses.

Astigmatism is not a disease. In fact, more than 90% of people have some degree of astigmatism.

Astigmatism occurs when the cornea, the clear front surface of the eye like a watch crystal, is not perfectly round. The real-world example we often use to explain astigmatism is the difference between a basketball and a football.

If you cut a basketball in half...

Knowing the difference between the various specialties in the eye care industry can be confusing, especially given the fact that they all start with the same letter and in many ways sound alike.

So, here’s a breakdown of the different monikers to make life a little less confusing for those wanting to get an eye exam.

Ophthalmologists

Ophthalmologists (pronounced “OFF-thal-mologists”) are eye doctors who went to four years of undergraduate university, four years of medical school and four to five years of ophthalmic residency training in the medical and surgical treatment of eye disease.

Many ophthalmologists then go on to pursue sub-specialty fellowships that can be an additional one to three years of education in areas such as cataract and refractive surgery, cornea and external disease, retina, oculoplastic surgery, pediatrics, and neuro-ophthalmology.

Ophthalmologists are licensed to perform eye surgery, treat eye diseases with eye drops or oral medications, and...