This activity reviews the Jackson cross cylinder as an instrument of refraction. It also describes the condition of astigmatism, its causes, and optical principles. The procedures and techniques involved in refining the cylinder powers and axes during refraction using the Jackson cross cylinder are considered. The conoid-of-Sturm and its importance to subjective refraction are also explained. This activity highlights the Jackson crossed-cylinder and touches on the role of the interprofessional team in managing patients with astigmatism.
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- Article / monograph / reference
- Credit · Up to 1 credit
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- Fee varies · this provider typically $49–98
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ReleasedSep 1, 2026
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Last day to claim creditSep 1, 2029 3 years left
