Contact Lens Vertex Calculator
Convert between spectacle and contact lens powers based on vertex distance
Contact Lens Power0.00 D
Calculated equivalent power
Power Difference0.00 D
Change in power due to vertex distance
Calculations
Convert Distance:distance / 1000 = 0.012
Spectacle to Contact:P₁ / (1 - d × P₁) = 0.000
Power Difference:P₂ - P₁ = 0.000
Recommendations
Power Selection
Minor power adjustment - standard adaptation expected
Vertex Distance
Vertex distance within normal range
Adaptation
Standard adaptation period should suffice
Follow-up
Schedule follow-up to verify visual acuity and comfort