Transactions from the Xth International Orthoptics Congress 2004

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deprivation occurs as BV has already matured. Its deterioration should be all the more light since cataract appears late in the first decade. Methods 75 cases of unilateral cataracts in children, last exam realised at least 3 years after cataract surgery (med 6.8 years). We separated the cases in 5 age groups function of age at surgery: 0 to 6 months: 16 cases = group 1 6 months to 1 year: 12 cases = group 2 1 to 2 years: 8 cases = group 3 2 to 4 years: 14 cases = group 4 4 to 8 years: 25 cases = group 5 Surgical procedure, treatment of aphakia and patching procedure are usual and have been discussed elsewhere, with monocular visual results [1]. We although report monocular visual results to be more complete on cases description. We focused the study essentially on binocular state: oculomotricity, state of BV (Normal or abnormal Retino Cortical Correspondence (nrcc or arcc), neutralisation) and stereoscopy (Lang stereotest and TNO). Results Monocular visual acuity: Fig.1 In group 1 and 2 (surgery before age 1), 40% of the cases gained over 0.4, 40% gained between 0.1 and 0.4, and 20% stayed below 0.1. After age 1, 66.8% gained over 0.4, 26.6% gained between 0.1 and 0.4 and 6.6% stayed below 0.1. These results are obtained after more than 3 years of amblyopia therapy, medium 6,8 years, and are discussed elsewhere [2]. Visual results in 75 cases of unilateral cataracts in children 100 80 60 40 20 0 0.4 Surg from 0 to 3 mths (11 cases) Surg from 1 to 8 yr (45 cases) Surg from 0 to 1 yr (30 cases) Fig.1: Visual results function of age at surgery(percentage of cases) Specific signs of infantile strabismus: Fig.1 Some clinical signs are really specific of infantile strabismus syndrome, the most primitive state of BV: manifest latent nystagmus, fixation in adduction, dissociated vertical deviation, asymmetry of optokinetic nystagmus Three of these signs are found together in more than 75% of cases in group 1, and 60% of cases in group 1 + 2. None of these three signs are found in 84 % of cases of group 3, 4 and 5. State of Binocular Vision = retino cortical correspondence and neutralisation: Fig.2 48 cases present neutralisation (masking evaluation of RCC), distributed in all groups. 15 cases present proved ARCC, almost all in groups 1 and 2 2
12 cases present documented NRCC, 80% in group 5. Manifest Latent Nystagmus DVD 100% 100% 80% 80% 60% 60% 40% 40% 20% 20% 0% 1 2 3 4 5 0% 1 2 3 4 5 % with MLN % without MLN % with DVD % without DVD Fig1 : presence or not of MLN and DVD function of age groups at surgery State of BV 100% 80% 60% 40% 20% 0% 1 2 3 4 5 NRCC ARCC Neutralisation Fig.2 : State of binocular vision function of age groups at surgery Stereoscopy improves markedly with age of surgery: Fig.3 No real stereoscopy can be identified on Lang test (and eventually TNO) in groups 1, 2 and 3. Gross stereoscopy (Lang 500” and TNO > 120”) is found in 3 cases in group 4 and 8 cases in group 5, and fine stereoscopy in 1 case in group 5 (TNO 60”). Stereoscopy 100% 80% 60% 40% 20% 0% 1 2 3 4 5 No stereoscopy Depth perception Gross steroscopy Fine stereoscopy Fig.3: State of stereoscopy function of age at surgery The type of horizontal deviation presents no specificity: Fig.4 Microtropia is found in 40% of group 1, 2 &3 and 70% of group 4 & 5. The frequency of esodeviation seems to lessen with age of surgery: 40% in group 1 & 2, 15% over age 1. Exotropia is found in all age groups around 15%. 3
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‘Global Perspectives Converge Dow
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The Burian Memorial Lecture: Factor
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Results Seventy-four patients fulfi
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three years of surgical alignment,
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onto temporal retina, regardless of
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Range of accommodation and binocula
Page 19 and 20: Table 2 Patient Preoperative fusion
Page 21 and 22: Assessing The Dominant Eye: A New M
Page 23 and 24: Figure 1. The Sensory Dominance Tes
Page 25 and 26: Does Dissociation Reduce Stereoacui
Page 27 and 28: Methods Observers were students in
Page 29 and 30: Initial 1.2 ** 1.4 ** 6.4 **** 7.1
Page 31 and 32: Does stereoacuity correlate with in
Page 33 and 34: Results The distance and near stere
Page 35 and 36: 3. Frisby, J.P., Davis, H., Edgar,
Page 37 and 38: measurement of sensory dominance (3
Page 39 and 40: Fig. 1. Durations of exclusive perc
Page 41 and 42: The results of all four stereotests
Page 43 and 44: varied, from 100% to 80% to 60% to
Page 45 and 46: Can stereo tests be an indicator of
Page 47 and 48: Pass No. Table 1. Number .of subjec
Page 49 and 50: Stereoacuity Following Unilateral A
Page 51 and 52: Table 1 Pre-operatively Post-operat
Page 53 and 54: Measurement And Improvement Of Visu
Page 55 and 56: Table 1 Criteria for visual skills
Page 57 and 58: Diagnosis And Treatment In Patients
Page 59 and 60: Reduction of asthenopic symptoms -
Page 61 and 62: Monovision By Implanted Intraocular
Page 63 and 64: Acknowledgements This study was sup
Page 65 and 66: The Effect Of Simulated Torsional D
Page 67 and 68: Table 3. Mean fusional convergence
Page 69: Strabismus In Childhood: Unilateral
Page 73 and 74: The Use Of A Computerised System Fo
Page 75 and 76: test. The main program also monitor
Page 77 and 78: Abstract Disruption of Binocular Vi
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Transactions from the Xth International Orthoptics Congress 2004

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