Investigation of Instrument for Photostress Recovery Time Test in the Eye

Purpose: This study was investigated to find out a useful instrument instead of direct ophthalmoscope for ocular photostress recovery time (PSRT) test. Methods: The PSRT test was performed using direct ophthalmoscope, trans illuminator, pen light, and camera flash for 48 subjects (average age 22.88 years, 96 eyes) who were corrected to 0.8~1.2 of visual acuity. Results: Each mean of PSRT measured by direct ophthalmoscope, trans illuminator, pen light, and camera flash was $27.90{\pm}18.40$ sec, $23.73{\pm}12.99$ sec, $21.31{\pm}15.57$ sec, and $18.98{\pm}11.64$ sec, respectively. The difference of PSRT between the eyes corrected more than 1.0 and the other eyes corrected under 1.0 of visual acuity was not found significantly. And there was no difference between dominant eyes and nondominant eyes of PSRT. Conclusions: Though the nearest instrument to direct ophthalmoscope was trans illuminator, pen light and camera flash could be the useful instruments for PSRT test.

눈의 광피로회복시간 검사를 위한 도구의 탐색

목적: 눈의 광피로회복시간(photostress recovery time; PSRT) 검사를 위해 직상검안경을 대체할 수 있는 도구를 탐색해보고자 하였다. 방법: 단안 최대교정시력이 0.8~1.2인 남녀 48명(평균연령 22.88세, 96안)을 대상으로 직상검안경, 투광기, 펜라이트, 카메라 플래쉬를 사용하여 PSRT 검사를 실시하였다. 결과: 직상검안경, 투광기, 펜라이트, 카메라 플래쉬로 측정된 평균 PSRT는 각각 $27.90{\pm}18.40$초, $23.73{\pm}12.99$초, $21.31{\pm}15.57$초, $18.98{\pm}11.64$초로 측정되었다. 두 눈 중 교정시력이 1.0 이상인 눈과 1.0 미만인 눈 간의 PSRT 차이는 없었다. 우위안과 비우위안 간의 PSRT 차이도 없었다. 결론: 투광기가 직상검안경과 가장 유사한 도구로 나타났으나, 카메라 플래쉬와 펜라이트도 PSRT 검사에 유용한 것으로 판단되었다.