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J Cataract Refract Surg. 2004 Apr;30(4):769-74.

Ocular dominance and patient satisfaction after monovision induced by intraocular lens implantation.

Author information

1
Doctor's Program of Medical Science, Kitasato University Graduate School, 1-15-1 Kitasato, Sagamihara-shi 228-8555, Japan. tomoya.handa@nifty.com

Abstract

PURPOSE:

To elucidate the relationship between ocular dominance and patient satisfaction with monovision induced by intraocular lens implantation.

SETTING:

Eye Clinic, Kitasato University School of Medicine Hospital, Sagamihara, Kanagawa, Japan.

METHODS:

The durations of exclusive visibility of dominant- and nondominant-eye targets were measured in 16 patients with successful monovision and 4 patients with unsuccessful monovision to determine the characteristics of ocular dominance. The dominant eye was determined using the hole-in-card test (sighting dominance). The contrast of target in nondominant eye was fixed at 100%; the contrast of target in the dominant eye varied (ie, 100% to 80% to 60% to 40% to 20%) using rectangular gratings of 2 cycles per degree that were 4 degrees in size.

RESULTS:

In the successful monovision group, the reversal thresholds (ie, exclusive visibility of the nondominant eye crosses over that of the dominant eye) were displayed only at low decreasing contrast (80% and 60%). However, in the unsuccessful monovision group, the reversal thresholds were at high decreasing contrast (20%) or not at all. The reversal thresholds in patients with unsuccessful monovision were at a significantly lower contrast than in patients with successful monovision (P<.05).

CONCLUSIONS:

Success and patient satisfaction in monovision patients were significantly influenced by the magnitude of ocular dominance. The balance technique seems to be a good method to evaluate the quantity of ocular dominance and prospectively evaluate the monovision technique.

PMID:
15093637
DOI:
10.1016/j.jcrs.2003.07.013
[Indexed for MEDLINE]

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