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Tooth doctor doesn't have the same ring as eye doctor
(lemmy.world)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
In the US at least, an optician is specifically a vendor of eyeglasses. The person who measures your vision and gives you the prescription is usually an optometrist. Neither of the above are physicians; whereas an ophthalmologist is a physician who treats eye diseases.