What does the cryptic crossword clue "Retina operated upon after I will find sloth (7)" mean?

The definition is "sloth". The wordplay uses an anagram. anagram of RETINA + I = INERTIA; definition: "sloth" The answer is INERTIA.

Retina operated upon after I will find sloth (7)

Guardian Cryptic #29516 | 8 Across | 2024-10-17 flower