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ÁֽùæÇâ¿¡ µû¸¥ µ¿Àû Á¶Àý¹ÝÀÀ·®ÀÇ º¯È­ Impact of Fixation Direction on Dynamic Accommodative Response

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±èÀçÀº, ¹Ú¿¹Çö, Á¶ÇÏ¿ø, ¹ÚÀÎÁö, ¹ÚÇü¹Î, Ãߺ´¼±,
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±èÀçÀº ( Kim Jae-Eun ) 
Daegu Catholic University Department of Optometry

¹Ú¿¹Çö ( Park Ye-Hyeon ) 
Daegu Catholic University Department of Optometry
Á¶ÇÏ¿ø ( Jo Ha-Won ) 
Daegu Catholic University Department of Optometry
¹ÚÀÎÁö ( Park Inn-Jee ) 
Davich Optical Chain Academy
¹ÚÇü¹Î ( Park Hyung-Min ) 
Daegu Catholic University Department of Optometry and Vision Science
Ãߺ´¼± ( Chu Byoung-Sun ) 
Daegu Catholic University Department of Optometry and Vision Science

Abstract

¸ñÀû : º» ¿¬±¸¿¡¼­´Â Á¶ÀýÀڱط®À» ´Þ¸®ÇÏ¿© ÁֽùæÇâ°ú Áֽ𢵵º¯È­¿¡ µû¸¥ Á¶Àý¹ÝÀÀ·®À» ÃøÁ¤ÇÏ°íÀÚ ÇÑ´Ù.

¹æ¹ý : ¾È°úÀû ¼ö¼úÀ̳ª ÁúȯÀÌ ¾ø°í ¾ç¾ÈÀÇ ½Ã·ÂÀÌ Á¤½ÃÀ̸ç, ½Ã±â´ÉÀÇ Â÷ÀÌ°¡ ³ªÁö ¾Ê´Â ¼ºÀÎ ³²³à 13¸í(22.40¡¾0.41¼¼)À» ´ë»óÀ¸·Î Á¤¸é, Ãø¹æ 10¡Æ, Ãø¹æ 20¡Æ, ÇϹæ 10¡Æ, ÇϹæ 20¡Æ¿¡ ½ÃÇ¥¸¦ À§Ä¡½ÃÄÑ 3 m, 1 m, 40 cmÀÇ °Å¸®º°·Î °³¹æÇü ÀÚµ¿¾È±¼Àý°Ë»ç±â¸¦ ÀÌ¿ëÇØ Á¶Àý¹ÝÀÀ·®À» ¿¬¼ÓÀûÀ¸·Î ÃøÁ¤ÇÏ¿´´Ù.

°á°ú : ¸ðµç ÁֽùæÇâ¿¡¼­ Áֽ🮰¡ ª¾ÆÁú¼ö·Ï Á¶Àý¹ÝÀÀ·®Àº Áõ°¡ÇÏ¿´´Ù. 3 m¸¦ Á¦¿ÜÇÑ 1 m, 40 cm ¿¡¼­´Â ÇϹæ 20¡Æ Áֽà ½Ã °¢°¢ 1.09¡¾0.10, 2.04¡¾0.11 D·Î Á¶Àý¹ÝÀÀ·®ÀÌ °¡Àå ³ô°Ô ³ª¿ÔÀ¸¸ç, 1 m °Å¸®¿¡¼­´Â Ãø¸é 20¡Æ Áֽà ½Ã 0.44¡¾0.05 D, 40 cm °Å¸®¿¡¼­´Â Ãø¸é 10¡Æ Áֽà ½Ã 1.54¡¾0.06 D·Î °¡Àå ³·Àº Á¶Àý¹ÝÀÀ·®À» ³ªÅ¸³»¾î Åë°èÀûÀ¸·Îµµ À¯ÀÇÇÑ Â÷À̸¦ º¸¿´´Ù(p£¼0.050). ¶ÇÇÑ, Ãø¹æ ½Ã 10¡Æ, 20¡Æ¸¦ Á¦¿ÜÇÑ ¸ðµç ÁֽùæÇâ¿¡¼­´Â ¼­·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ ³ªÅ¸³µÀ¸¸ç(p£¼0.050), ÁֽùæÇâ°ú Á¶Àý¹ÝÀÀ·®Àº ¼­·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ ÀÖ¾ú´Ù(p£¼0.050).

°á·Ð : º» ¿¬±¸ÀÇ °á°ú·Î µ¿ÀÏÇÑ Á¶ÀýÀڱط®¿¡ ´ëÇؼ­µµ ÁֽùæÇâ°ú Áֽ𢵵¿¡ µû¶ó Á¶Àý¹ÝÀÀ·® ÀÌ ´Þ¶óÁö´Â °ÍÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. µû¶ó¼­ ±Ù°Å¸® ¾÷¹« ½Ã Áֽù°Ã¼ÀÇ À§Ä¡¸¦ ´«³ôÀÌ Á¤¸éº¸´Ù ÇϹæÀ¸·Î µÎ¸é ´õ ¼±¸í »óÀ» ¾òÀ» ¼ö ÀÖÀ¸¹Ç·Î Áö¼ÓÀûÀÎ ±Ù°Å¸® ¾÷¹«¿¡ µû¸¥ ¾ÈÁ¤ÇǷθ¦ ÃÖ¼ÒÈ­ ÇÒ ¼ö ÀÖÀ» °ÍÀ¸·Î »ç·áµÈ´Ù.

Purpose : The purpose of this study was to measure accommodative response when looking at different direction such as downgaze and sidegaze either right or left.

Methods : This study was performed with 13 adult males and females(22.40¡¾0.41 years old) no subject had ophthalmic surgery or disease and placed the targets at the primary, 10¡Æ and 20¡Æ sidegaze, 10¡Æ and 20¡Æ downgaze, The accommodative responses was measured by a open-field autorefractometer under the distances of 3 m, 1 m and 40 cm that enable consecutive measurement.

Results : In all gaze directions as distance became shorter the accommodative response increased. At each viewing distance 1m and 40 cm, the accommodative responses showed the peaks 1.09¡¾0.10 D in 10¡Æ and 2.04¡¾0.11 D in 20¡Æ downgaze. respectively, while the lowest accommodative responses were 0.44¡¾0.05 D and 1.54¡¾0.06 D in 20¡Æ and 10¡Æ sidegaze, which showed statistical differences(p£¼0.050). There were significant differences in each viewing direction except for in 10¡Æ and 20¡Æ sidegaze(p£¼0.050). The gaze direction and the accommodative responses were significantly different(p£¼0.050).

Conclusion : This study demonstrates that the accommodative responses vary with the gaze direction and gaze angle for the same modulating stimulus. Therefore, it is assumed that 20¡Æ downgaze makes the object sharper and minimizes the eye fatigue.

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Á¶Àý; Á¶Àý¹ÝÀÀ; ÁֽùæÇâ
Accommodation; Accommodative responses; Gaze direction

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