The phrase "alter the impression" is correct and usable in written English.
You can use it when discussing changes to someone's perception or understanding of a situation or subject.
Example: "The new marketing strategy aims to alter the impression that our product is too expensive."
Alternatives: "change the perception" or "modify the view".
He never tried to alter the impression.
Still, that stage trick came too late to alter the impression of a production with no compelling point of view.
That he turns men into freaks too doesn't really alter the impression that Wolverton's art is a for-boys-only art.
A few people wander past, but they cannot alter the impression: this town may have bustled once, but not any more.
A lacklustre peanut butter cheesecake on an overly thick biscuit base with a splodge of fruit compote does not alter the impression: Porky's does key things very well indeed.
A more astutely focused, judiciously selected exhibition might lead to different conclusions, but this one will not alter the impression that last rites for this type of show are in order.
A stratified analysis demonstrated that epidemiology training did not meaningfully alter the effect of journal attribution on participants' impression scores.
But it comes late, and feels thinly schematic, and doesn't alter the overwhelming impression left by the book, of a large talent saddled with a project that hasn't inspired him as much as he expected it to.
The St. Lawrence's impassioned performance of Schumann's Quartet in A minor that ended the concert did not alter the overall impression of an event that was more a thrown-together tribute than a well-conceived program.
This decision was due to the fact that admittance might alter the initial impression and satisfaction levels of outpatients and can confound the findings.
"The enthusiasm for Botta was so great that it was clear that it would be unlikely a competition would alter the initial impressions of the committees," he said.
