What’s the difference between an optician and an optometrist?

When you come in for your eye test and any subsequent examination, you will probably meet and be looked at by several different individuals. Different eye care specialists carry out different roles, so what’s the difference between an optician and an optometrist?

Eye test with optometrist.
A blonde-haired woman having her eyes tested by a bespectacled and bearded optometrist.
Man with short hair and blue shirt having his eyes tested by a dark-haired woman looking into testing equipment.
Dispensing Optometrist