眼内レンズと後嚢との間隙にみられた高散乱性液状物質の画像診断

Image analysis of light:scattering liquid between the intraocular lens and the posterior capsule

　眼内レンズ（PMMAレンズ）挿入術後1年〜3年半後にIOL後面と後嚢との間に液状の貯留物質が出現した3例を報告した。3例はともに後嚢下白内障例で，糖尿病網膜症を有している。いずれも前房側，後眼部にも眼内炎症を疑わせる所見はなく，また前房深度，屈折も術後早期と変わりなく，視力，眼圧への影響もみられなかった。Scheimpflugスリット画像から液状物質が呈する光学特性は，眼内レンズ後面と後嚢の距離が長い症例ほど高かった。

We observed three eyes which developed accumulation of liquid material between the implanted intraocular lens (IOL) and the posterior capsule 12 to 40 months after cataract surgery. All the eyes were diabetic and had posterior subcapsular cataract. There were no findings suggesting inflammation in the anterior or posterior ocular segment. The anterior chamber depth and refraction remained unchanged throughout the postoperative period. The presence of liquid accumulation posterior to the IOL did not affect the visual acuity or intraocular pressure. The optical features of the liquid material, as estimated by Scheimpflug slit imaging, were more pronounced in eyes with larger distance between the IOL and the posterior capsule.