The present invention relates to an ophthalmic suspension formulation comprising (R)-(-)-2-(4-bromo-2-fluorobenzyl)-1,2,3,4-tetrapyrrolo[1,2-a]pyrazine-4-spiro-3'-pyrrolidine-1,2',3,5'-tetrone, which can make it possible to avoid side effects due to systemic exposure, is useful for treating diseases in posterior eye segment, and is very stable in preservation.本發明係關於一種含有(R)-(-)-2-(4-溴-2-氟苄基)-1,2,3,4-四氫吡咯并[1,2-a]吡-4-螺-3'-吡咯啶-1,2',3,5'-四酮之點眼用懸濁製劑，其能夠避免因全身暴露引起之副作用，並且對眼後段疾病等有用且穩定性優異。
