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Guide to relative C/D ratios – this handy guide contains schematic diagrams of C/D ratios from 0.1 to 0.9. Provides ready clinical reference to facilitate the accurate grading of C/D ratios. Improves the reliability of estimates by different practitioners and at successive visits. |
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Handy guide to orthoptics (printed on reverse side of guide to C/D ratios) – includes a star diagram of the principal muscle actions of the extra-ocular muscles. Helps practitioners to interpret those tricky motility test findings. Also includes a table of the additional actions of the extra-ocular muscles in the primary position. |
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Helps predict the effect of pareses on the cover test result in the primary position – also includes a table of the norms of monocular amplitudes of accommodation (after Duane). |
