The phrase "a sharp impression" is correct and usable in written English.
It can be used to describe a strong or vivid effect that something has on someone, often in terms of perception or memory.
Example: "The artist's use of color left a sharp impression on the audience, making the painting unforgettable."
Alternatives: "a strong impression" or "a vivid impression".
These elements don't entirely tie together, but they create a sharp impression.
Sam Holcroft has already made a sharp impression as a dramatist.
Rachel De-lahay made a sharp impression with her mosaic of modern, multicultural London, The Westbridge.
They all remembered him with the greatest clarity, because he had made such a sharp impression at the time.
At Winchester college (1944-49), where I first met him, he made a sharp impression; he was literate, in command of the language, almost sophisticated.
Still, this time, Mr. Galliano's mix of undersize jackets and oversize pants — low in the crotch and at the waist and held up with suspenders — made a sharp impression.
In the three male-female duets that follow, the Miami dancers again made a sharper impression (although City Ballet's Tyler Angle is ideally cast as the romantically elegant third man, the one whom the three fates suddenly seize).
This Los Angeles-area punk foursome, which takes its name from the reclusive octogenarian actor, isn't particularly political (or particularly funny), but Mr. Velazquez managed a fairly sharp impression of the Republican vice-presidential nominee, mocking some of her policies using her voice.
Someone on Twitter had been doing a sharp Shaquille O'Neal impression (he used Mr. O'Neal's name, since Twitter doesn't require proof to take a user name) and it came to Ms. Hessert's attention.
I'm coming to Florida" — leaving the sharp impression that he was in Dallas, not at the front door, at the time of de Mohrenschildt's demise.
"Get Happy" leaves the Garland legend in need of a sharper lithic impression than this.
