Le médecin regarde mon œil droit et dit que tout va bien.

my

Breakdown of Le médecin regarde mon œil droit et dit que tout va bien.

• et: and
• aller: to go
• que: that

Questions & Answers about Le médecin regarde mon œil droit et dit que tout va bien.

Why is it regarde and not regarder or regardes in this sentence?

Regarder is the infinitive form (to look at).
In a real sentence you must conjugate the verb to match the subject:

• je regarde
• tu regardes
• il / elle / on regarde
• nous regardons
• vous regardez
• ils / elles regardent

The subject here is le médecin, which is third person singular (il/elle), so you use regarde.
Regarder would be used after another verb (e.g. il va regarder, he is going to look), and regardes is only for tu (you singular).

Why don’t we use a preposition like à (e.g. regarde à mon œil)?

In French, regarder is a direct transitive verb: it takes its object directly, with no preposition.

• regarder quelque chose = to look at something
  → Le médecin regarde mon œil.

Saying regarder à mon œil here would be incorrect.
There is a different expression regarder à in some contexts (e.g. regarder à la dépense = to be careful with spending), but that’s a different meaning, not the literal sense of looking at a physical thing.