defocus(redirected from Defocus aberration)
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tr.v. de·fo·cused, de·fo·cus·ing, de·fo·cus·es or de·fo·cussed or de·fo·cus·sing or de·fo·cus·ses
To cause (a beam or a lens) to deviate from accurate focus.
The act or result of causing a lens to deviate from accurate focus.
formal to go or cause to go out of focus