A comparison of the visual acuity in normal infants and children with retinoblastoma, as assessed by preferential looking method.

DOI Open Access
  • MAKINO Fumie
    Department of Ophthalmology, Teikyo University Ichihara Hospital
  • OHHASHI Rie
    Department of Ophthalmology, Teikyo University Ichihara Hospital
  • KISARA Shigeko
    Department of Ophthalmology, Teikyo University Ichihara Hospital
  • IKOMA Hiroshi
    Department of Ophthalmology, Teikyo University Ichihara Hospital
  • MINODA Kensei
    Department of Ophthalmology, Teikyo University Ichihara Hospital

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Other Title
  • 正常児と網膜芽細胞腫患児におけるＰ．Ｌ．視力の比較

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Development of visual acuity in children with retinoblastoma (9 unilateral, 5 bilateral cases) was quantitatively measured by preferential looking (P. L.) method, and was compared with that in normal infants (70 cases, 124 eyes) at ages from 4 months to 24 months.<br>The visual acuity was measured by quick method using Awaya-Mohindra P. L. apparatus (Nitten).<br>The visual acuity of unilateral eye in normal controls was measured with eye-patch.<br>Normal eyes in unilateral cases of retinoblastoma tended to show always better visual acuity than the average visual acuity of unilateral eyes in normal controls.<br>The above finding may have resulted from following reasons;<br>1) Children with retinoblastoma may have been familiar with P. L. method.<br>2) No influence of eye-patch, because of enucleation of the diseased eye.<br>3) Individual variations.<br>4) Development of visual function may have been promoted in normal eyes, because of loss of the diseased eyes.<br>On the other hand, in bilateral cases of retinoblastoma, P. L. method was considered clinically significant since visual acuity of the eye treated by conservative methods was quantitatively and continually measured during the course.

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