Dictionary

keep one's eye in en · VERB

(UK) To keep in practice.
- A man must have some work to keep his eye in and his muscles at work. 1906 July 19, Mr. Crooks, The parliamentary debates, volume 161:
- He'd have a beer first, just to keep his eye in; and afterwards he would have a little of the hard stuff. 1968, John Le Carré, A Small Town in Germany, page 29:
- He went trap-shooting to keep his eye in, out of season 1981 July, Nadine Gorimer, “July's People”, in Mother Jones Magazine, volume 6, number 6, page 46:

Spelling	Features	Source
kept one's eye in	Tense=Past, VerbForm=Part	lexicographic
kept one's eye in	Tense=Past	lexicographic
keeps one's eye in	Number=Sing, Person=3, Tense=Pres	lexicographic
keeping one's eye in	Tense=Pres, VerbForm=Part	lexicographic