眼内レンズ移植眼の網膜光障害に対する紫外線フィルターの効果

Effect of ultraviolet filter during intraocular lens implantation surgery on light-induced maculopathy

　眼内レンズ移植術中の網膜光障害の予防対策として手術用顕微鏡に紫外線（UV）フィルターを装着することの有効性について検討した．両眼の眼内レンズ移植患者20症例にトプコンOMS-320を用いて，眼内レンズ移植時に片眼は波長420nm以下をカットするHOYAシャープカットフィルターを装着，他眼はUVフィルター装着せず手術を施行した．術後1〜2週と3カ月目に螢光眼底造影を施行し，左右眼の網膜光障害の程度について比較検討した．網膜光障害の発生について手術時間・術者・術後の視力などに相関関係は認めなかった．20症例のうち2眼だけ網膜光障害の発生を認め，2眼ともUVフィルター未使用例であった．眼内レンズ移植後，UVフィルターを装着することにより網膜光障害の発生を予防できることが確認された．

We performed a prospective study to determine the effect of ultraviolet filter in the operating microscope on preventing light-induced maculopathy during intraocular lens implantation surgery. Twenty patients underwent extracapsular cataract extraction with implantation of posterior chamber intraocular lens for both eyes. In aran-domized way, one eye of the patient was assigned to surgery with the filter in use and the fellow eye without. The ultraviolet filter was designed to eliminate all the light of less than 420 nm wave-length. All the eyes were examined by fluorescein fundus angiography 1 to 2 weeks and again 3 months after surgery.

Light-induced maculopathy occurred in none when operated with the filter in place and in 2 eyes without the filter. Other factors, including duration of surgery, presurgical visual acuity and individual-ity of the surgeon, were not correlated with the incidence. The findings indicate that the use of ultraviolet filter is of value in preventing light -induced maculopathy after extracapsular cataract extraction with intraocular lens implantation

Rinsho Ganka (Jpn J Clin Ophthalmol) 42(5) : 513-516, 1988