新しい視野計による中心視野測定

"Central field screener". A new tool for screening and routine quantitative campimetry

　Park Central Field Tangent ScreenとAuto-plot Tangent Screenを改良して，新しい中心視野計Central Field Screenerを開発した。

　この視野計は，古典的黒板視野計や中心視野のscreening campimeterとしてばかりでなく，flicker campimeterやquantitative projectioncampimeterとして用いることができる。

A light weight portable "Central Field Screener" was designed for screening and routine quantitative campimetry. The new campimeter is the modifica-tion of Park Central Field Tangent Screen (Sola) and uses 46 static red diode targets and one target for fixation. These targets have the diameter of 3.0 mm and light up for 0.1-2.5 seconds and flicker at the frequency of 5, 10, 15, 25, 30 and 35 Hz. Four targets are exposed simultaneously at the dis-tance of 50 cm and any one of these four targets can be extinguished at the examiner's will.