Wikia

Oculus Reparo
Incantation	Oculus Reparo
Type	Transfiguration Charm
Hand Movement	Circular Movement with wand or point at glasses
Light	None
Effect	Repairs glasses

Oculus Reparo is a variant of the Reparo spell that is used to repair broken glasses.

Known Uses

Hermione Granger used this spell to mend Harry Potter's glasses when they first met on the Hogwarts Express in 1991.
Arthur Weasley probably used a nonverbal version of this spell to fix Harry's glasses in 1992.

The incantation comes from the Latin "reparo" meaning "to renew" or "repair," and the Latin "oculus," meaning "eye."

This spell only appears in the film adaptations of Harry Potter and the Philosopher's Stone and Harry Potter and the Chamber of Secrets, but, as mentioned above, there may be nonverbal uses in the books.
In the film adaptation of Harry Potter and the Chamber of Secrets, Hermione Granger uses this spell in Diagon Alley, despite being underage and thus not permitted to use magic outside of school. This may have been allowed to slide because Hermione was in a location filled with other witches and wizards, and The Trace would not have been able to catch her. It is also possible that Oculus Reparo is considered such a mundane, harmless spell that its use was not enough to trigger a violation. Hermione's use of the spell in the first film was permittable as students are allowed to perform magic on the train. In the earlier films, the spells seem to be almost all long, two-word incantations, so the 'reparo' spell may have just been modified to have an 'oculus' in front of it.
In LEGO Harry Potter: Years 1-4, Ron tries to use this spell to fix Harry's glasses but instead turns a wizard's hat into a frog.

Oculus Reparo

Incantation	Oculus Reparo
Type	Transfiguration Charm
Hand Movement	Circular Movement with wand or point at glasses
Light	None
Effect	Repairs glasses