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Technical notes on prism-dioptre and Prentice's rule.
Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists) 2021 December 5
PURPOSE: To show an alternative interpretation for prism-dioptre and access Prentice's rule accuracy.
METHODS: Algebraic calculation.
RESULTS: The prism-dioptre can be expressed as a percentage of the distance between the prism and the plane of prismatic dislocation. Prentice's rule is an imprecise mathematical expression prone to expressive errors.
CONCLUSIONS: The prism-dioptre seems to be more informative when interpreted as a percentage. Prentice's rule is more effective as a pedagogical approach for introducing the concept of spherical lenses' prismatic image dislocation rather than a method for calculating its actual value.
METHODS: Algebraic calculation.
RESULTS: The prism-dioptre can be expressed as a percentage of the distance between the prism and the plane of prismatic dislocation. Prentice's rule is an imprecise mathematical expression prone to expressive errors.
CONCLUSIONS: The prism-dioptre seems to be more informative when interpreted as a percentage. Prentice's rule is more effective as a pedagogical approach for introducing the concept of spherical lenses' prismatic image dislocation rather than a method for calculating its actual value.
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