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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Melville, A.C.; Firth, A.Y. (2002)
Languages: English
Types: Article
Subjects:
Aim: To investigate the relationship between prism\ud fusion range (PFR) and vergence facility (VF)\ud measurements in subjects with normal binocular\ud vision.\ud \ud \ud Methods: Twenty-eight subjects (mean age 19 ± 1\ud years) with normal binocular single vision (BSV)\ud underwent measurement of the PFR and VF in a\ud varied order, at a test distance of 1/3 m. The PFR\ud measurements recorded were the base out (BO) range\ud to blur and break point and base in (BI) range to\ud break point. The total PFR was calculated. The VF\ud was assessed over a 1 min time period using a 12(Δ)BO/\ud 3(Δ)BI flip prism and recorded in cycles per minute\ud (cpm).\ud \ud \ud Results: No correlation was demonstrable between\ud any of the single measures of the PFR and the VF\ud results. The BO PFR to break point and the BI PFR\ud results obtained (means 46(Δ) BO and 14(Δ) BI) were not\ud significantly different from quoted ‘normal’ values.\ud The VF results obtained (mean 12 ± 4.2 cpm) were\ud found to be significantly different from the reported\ud mean value.\ud \ud \ud Conclusion: In a group of young adults with normal\ud BSV, no correlation between PFR and VF was found.\ud The two tests may quantify different aspects of\ud vergence or, alternatively, results of one or both tests\ud in this study may be unreliable.
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    • 1. Buzzelli AR, Trowell-Harris I. The measurement of visual efficiency standards for pilots in the United States Airforce. Military Med 1989; 154: 345-347.
    • 2. Gall R, Wick B, Bedell H. Vergence facility and target type. Optom Vis Sci 1998; 75: 727-730.
    • 3. Buzzelli AR. Vergence facility: developmental trends in a school age population. Am J Optom Physiol Opt 1986; 63: 351-355.
    • 4. Ciuffreda KJ. Components of clinical near vergence testing. J Behav Optom 1992; 3: 3-13. Cited in Pellizzer S, Siderov J. Assessment of vergence facility in a sample of older adults with presbyopia. Optom Vis Sci 1998; 75: 817-821.
    • 5. Delgadillo HM, Griffin JR. Vergence facility and symptoms: a comparison of two flipper tests. Optom Vis Sci 1989; 66 (Suppl): 230. Cited in Gall R, Wick B, Bedell H. Vergence facility: establishing clinical utility. Optom Vis Sci 1998; 75: 731-742.
    • 6. Pellizzer S, Siderov J. Assessment of vergence facility in a sample of older adults with presbyopia. Optom Vis Sci 1998; 75: 817-821.
    • 7. Hoffman LG, Rouse M. Referral recommendations for binocular function and/or developmental perceptual deficiencies. J Am Optom Assoc 1980; 51: 119-126. Cited in Pellizzer S, Siderov J. Assessment of vergence facility in a sample of older adults with presbyopia. Optom Vis Sci 1998; 75: 817-821.
    • 8. Dwyer PS. The Portsea Lord Major's children's camp vision screening: a rationale and protocol for optometric screening. Aust J Optom 1983; 66: 178-186. Cited in Pellizzer S, Siderov J. Assessment of vergence facility in a sample of older adults with presbyopia. Optom Vis Sci 1998; 75: 817-821.
    • 9. Waugh SJ. The value of measuring convergence accommodation and rapid prism adaptation clinically [unpublished MSc thesis]. The University of Melbourne, 1986. Cited in Pellizzer S, Siderov J. Assessment of vergence facility in a sample of older adults with presbyopia. Optom Vis Sci 1998; 75: 817-821.
    • 10. Griffin JR. Lecture notes for course #453. Southern California College of Optometry, spring 1981. Cited in Pellizzer S, Siderov J. Assessment of vergence facility in a sample of older adults with presbyopia. Optom Vis Sci 1998; 75: 817-821.
    • 11. Griffin JR, Lee RA. Visual skills norms in college students. Optom Monthly 1984; 75: 103-104. Cited in Pellizzer S, Siderov J. Assessment of vergence facility in a sample of older adults with presbyopia. Optom Vis Sci 1998; 75: 817-821.
    • 12. Gazia RP, Nicholson SB. A study of binocular accommodative and vergence facility and predictive analysis of global stereopsis. J Behav Optom 1991; 2: 3-6. Cited in Pellizzer S, Siderov J. Assessment of vergence facility in a sample of older adults with presbyopia. Optom Vis Sci 1998; 75: 817-821.
    • 13. Buzzelli AR. Stereopsis, accommodative and vergence facility: Do they relate to dyslexia? Optom Vis Sci 1991; 68: 842-846.
    • 14. Christenson GN, Winklestein AM. Visual skills of athletes versus nonathletes: development of a sports vision testing battery. J Am Optom Assoc 1988; 59: 666-675.
    • 15. Gall R, Wick B, Bedell H. Vergence facility: establishing clinical utility. Optom Vis Sci 1998; 75: 731-742.
    • 16. Flueler UR, Elhatton KM, Guyton DL. A combination horizontal/ vertical prism bar: a precisely calibrated tool for use in front of one eye. Strabismus 1995; 3: 27-33.
    • 17. Thompson JT, Guyton DL. Ophthalmic prisms: measurement errors and how to minimize them. Ophthalmology 1983; 90: 204- 209.
    • 18. Ansons AM, Davis H. Diagnosis and Management of Ocular Motility Disorders. 3rd ed. Oxford: Blackwell Science, 2001: 127-128.
    • 19. Maddox. 1893. Cited in Schor CM. Vergence eye movements: basic aspects. Wenner-Gren International Symposium 37. Oxford: Pergamon Press, 1981; 83-91.
    • 20. Schor CM. Vergence eye movements: basic aspects. Wenner-Gren International Symposium 37. Oxford: Pergamon Press, 1981: 83- 91.
    • 21. Mitchell DE. Properties of stimuli eliciting vergence eye movements and stereopsis. Vision Res 1969; 10: 145-162.
    • 22. Semmlow JL, Hung GK, Ciuffreda KJ. Quantitative assessment of disparity vergence components. Invest Ophthalmol Visual Sci 1986; 27: 558-564. Cited in Munoz P, Semmlow JL, Yuan W, Alvarez TL. Short term modification of disparity vergence eye movements. Vision Res 1999; 39: 1695-1705.
    • 23. Semmlow JL, Hung GK, Horng JL, Cuiffreda KJ. Disparity vergence eye movements exhibit preprogrammed motor control. Vision Res 1994; 34: 1335-1343. Cited in Munoz P, Semmlow JL, Yuan W, Alvarez TL. Short term modification of disparity vergence eye movements. Vision Res 1999; 39: 1695-1705.
    • 24. Horng J, Semmlow JL, Hung GK, Ciuffreda JK. Initial component control in disparity vergence: a model-based study. IEEE Trans Biomed Eng, 1998; 45: 249-258.
    • 25. Munoz P, Semmlow JL, Yuan W, Alvarez TL. Short term modification of disparity vergence eye movements. Vision Res 1999; 39: 1695-1705.
    • 26. Mays LE, Porter JD, Gamilon DR, Tello CA. Neural control of vergence eye movements: neurons encoding vergence velocity. J Neurophysiol 1986; 56: 1007-1021. Cited in Horng J, Semmlow JL, Hung GK, Ciuffreda JK. Initial component control in disparity vergence: a model-based study. IEEE Trans Biomed Eng 1998; 45: 249-258.
    • 27. Wesson MD. Normalisation of prism bar vergences. Am J Optom Physiol Opt 1982; 59: 628-633. Cited in Scheiman M, Herzberg H, Frantz K, Margolies M. A normative study of step vergence in elementary school children. J Am Optom Assoc 1989; 60: 276- 280.
    • 28. Rosenfield M, Ciuffreda KJ, Ong E. Vergence adaptation and the order of clinical vergence range testing. Optom Vis Sci 1995; 72: 219-223.
    • 29. von Noorden GK. Binocular Vision and Ocular Motility: Theory and Management of Strabismus. St Louis: Mosby, 1996: 197-202.
    • 30. Ogle KN, Martens TG, Dyer AJ. Oculomotor Imbalance in Binocular Vision and Fixation Disparity. Philadelphia: Lee and Febiger, 1967. Cited in Schor CM. Vergence eye movements: basic aspects. Wenner-Gren International Symposium 37. Oxford: Pergamon Press, 1981: 83-91.
    • 31. Hung GK, Zhu H, Ciuffreda KJ. Convergence and divergence exhibit different response characteristics to symmetric stimuli. Vision Res 1997; 37: 1197-1205. Cited in Munoz P, Semmlow JL, Yuan W, Alvarez TL. Short term modification of disparity vergence eye movements. Vision Res 1999; 39: 1695-1705.
    • 32. Gamlin PDR, Mays LE. Dynamic properties of the medial rectus motorneurons during vergence eye movements. J Neurophysiol 1992; 67: 64-74. Cited in Horng J, Semmlow JL, Hung GK, Ciuffreda JK. Initial component control in disparity vergence: a model-based study. IEEE Trans Biomed Eng 1998; 45: 249-258.
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