Journal of Korean Ophthalmic Optics Society (한국안광학회지)

The Korean Ophthalmic Optics Society (한국안광학회)
권호 표지

A Study About N.P.C, Heterophoria and Near Convergence and Divergence by Amount of the Refractive Errors

굴절이상도에 따른 폭주근점과 근거리 수평사위, 폭주 및 개산 여력의 연구

  • Choi, Sun-Mi (Department of Ophthalmic Optics, Jeonbuk Science College)
  • Received : 2009.10.27
  • Accepted : 2009.12.08
  • Published : 2009.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

Purpose: To study the relationship of N.P.C, heterophoria and near convergence and divergence by amount of the refractive error. Methods: All subjects have no ocular disease and their mean age is 22.7. All 39 subjects examined about refractive error, near point of convergence (NPC), heterophoria, near convergence and divergence. Results: Classified by low refractive state, middle refractive state, and high refractive state compared with the expected value of Morgan. NPC had been measured within low and middle refractive state eight all the 8cm. However, high refractive state measured 9.64 cm. Low and middle refractive state for the classification by near phoria. Near esophoria groups was smallest by near divergence and exophoria groups was smallest by near convergence. Conclusions: Near convergence were largest with esophoria while near divergence were largest with exophoria.

목적: 각각의 굴절이상도에 따른 폭주근점(N.P.C), 근거리 수평사위, 근거리 폭주 개산여력을 알아보고자 하는 연구이다. 방법: 안과적 수술이나 질환이 없는 대학생 39명(평균 22.7세)을 대상으로 굴절이상도, 폭주근점, 근거리 수평사위, 근거리 폭주 및 개산여력을 측정하였다. 결과: 검사 결과를 경도, 중도, 고도 굴절이상에 따라 모건분류 정상 기대값과 비교하여 분류하였다. 폭주근점(NPC)은 경도, 중등도 모두 8 cm 이내로 검출된 반면 강도 굴절이상에서는 9.64 cm가 검출되었다. 경도 및 중등도 굴절이상도에서 근거리 수평사위에 의한 분류를 하였을 경우 내사위의 경우 근거리 개산여력이 가장 적었으며, 반면 폭주여력에서는 강한 외사위 그룹이 적게 검출되었다. 결론: 폭주여력은 내사위에서 크고 외사위에서 작은 반면, 개산여력은 내사위에서 적고 외사위에서 크게 나타났다.

Keywords

References

  1. 고은교, "청장년 한국인의 안위에 관한 연구", 대한안과학회지, 16(4):358-362(1975).
  2. Scobee R. G. and Green E. L., "Further Studies in the relationship between hetero-phoria and prism vergence", America J. Ophth. 34:401(1951). https://doi.org/10.1016/0002-9394(51)91487-0
  3. 이상욱, "한국인에 사위와 융합력에 대하여", 대한안과학회지, 6(1):23-27(1965).
  4. Rouse M. W., Borsting E., Hyman L., Hussein M., Cotter S. A., Flynn M., Scheiman M., Gallaway M., De Land P. N., "Frequency of convergence insufficiency among fifth and sixth graders", Optom. Vis. Sci. Sep;76(9):643-9(1999). https://doi.org/10.1097/00006324-199909000-00022
  5. Duke-Elder S., "The physiology of the eye and of vision In: Duke-Elder S, ed", System of ophthalmology, vol IV: Louis: Mosby(1968). (http://www.childrensvision.com/effectiveness.htm)
  6. Daum K. M., "The course and effect of visual training on the vergence system", Am. J. Optom. Physiol. Opt. 59:223-7(1982). https://doi.org/10.1097/00006324-198203000-00004
  7. Scheiman M., Mitchell G. L., Cotter S., et al., "the Convergence Insufficiency Treatment Trial (CITT) Study Group. A randomized clinical trial of treatments for convergence insufficiency in children", Archives of Ophthalmology. 123:14-24(2005). https://doi.org/10.1001/archopht.123.1.14
  8. Gallaway M., Scheiman M., and Malhotra K., "Effectiveness of pencil pushups treatment of convergence insufficiency: A pilot study", Optom. Vis. Sci. 79:265-267(2002). https://doi.org/10.1097/00006324-200204000-00013
  9. Convergence Insufficiency Treatment Trial Study Group. "Randomized clinical trial of treatments for symptomatic convergence insufficiency in children", Archives of Ophthalmology. Oct;126(10):1336-49(2008). https://doi.org/10.1001/archopht.126.10.1336
  10. Griffin, Grisham, Ciuffreda, "Binocular Anomalies: Diagnosis and Vision Therapy", 2nd Ed., Butterworth-Heinemann. London, UK, pp. 44(1995).