Optics
Combined Lens Power
For thin lenses in contact, the total power is the sum of individual powers.
Variables
P_{total}D
Total power
P_1D
Power of lens 1
P_2D
Power of lens 2
Your notes
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Common questions
What is the Combined Lens Power formula?
Combined Lens Power is written Pₜₒₜₐₗ = P₁ + P₂. For thin lenses in contact, the total power is the sum of individual powers. It belongs to Optics, under Lenses.
What are the units in Pₜₒₜₐₗ = P₁ + P₂?
In SI units, P_{total} is total power, measured in D; P_1 is power of lens 1, measured in D; P_2 is power of lens 2, measured in D.