単一裂孔と多発裂孔による網膜剝離眼（有水晶体眼）の特性

Characteristics of eyes with phakic rhegmatogenous retinal detachment with single or multiple breaks

要約　目的：有水晶体眼での単一裂孔と多発裂孔による網膜剝離眼の特性の報告。対象と方法：裂孔原性網膜剝離98例98眼を対象とした。男性58例，女性40例であり，50歳以上で，白内障と硝子体同時手術を行い，硝子体切除腔容積が測定できた症例とした。結果：単一裂孔は52眼，複数の裂孔は46眼にあった。眼軸長が23mm以下の12眼では11眼が単一裂孔であり，27mm以上の8眼では5眼が多発裂孔，23～27mmの中間群では78眼中38眼が単一裂孔で40眼が多発裂孔であった。角膜曲率半径と硝子体切除腔容積は，単一裂孔群よりも多発裂孔群で有意に大きかった。中間群では単一裂孔群と多発裂孔群とでは，眼軸長に有意差がなかった。結論：有水晶体の網膜剝離眼では，眼軸長と眼球の大きさや形状が裂孔の数に関係する。

Abstract.　Purpose：To report the characteristics of eyes with phakic rhegmatogenous retinal detachment with single or multiple breaks. Cases and Method：This retrospective study was made on 98 eyes of 98 cases of rhegmatogenous retinal detachment. The series comprised 58 males and 40 females. All the cases were aged 50 years or over,received simultaneous cataract and vitreous surgery,and were measured for the volume of resected vitreous cavity. Results：There were 52 eyes with single retinal break and 46 eyes with multiple breaks. Out of 12 eyes with axial length of 23 mm or less,11 eyes had single break. Out of 8 eyes with axial length of 27 mm or over,5 eyes had multiple breaks. Out of 78 eyes with axial length between 23 mm and 27 mm,38 eyes had single break and 40 eyes had multiple breaks. Corneal curvature radius and volume of vitreous cavity was significantly greater in eyes with multiple breaks than single break. There was no significant difference in axial length in eyes with multiple or single break between 23 mm and 27 mm. Conclusion：Axial length,vitreous volume,and cornel curvature radius are related with the number of retinal break in eyes with phakic retinal detachment.