Patent ID: 11944381
Assignee: ESSILOR INTERNATIONAL
Field: Optics (Instruments)
Classification: CPC A  G | IPC A  G

Claim 8:
9. The optometry system according to claim 8,
wherein in the further utilization phase of the phoropter, a global function corresponding to the combination of the static and dynamic curves or functions of the actual optical power of the active lens is used for the correction, and
wherein in the further utilization phase of the phoropter, the global function is defined relatively to a reference temperature Tref and to a related reference optical power Pref:

Pcurrent=Pref+α*(Tcurrent−Tref+β*e−(t/δ))

where Pcurrent is the actual optical power, α a sensitivity to the temperature, β a temperature coefficient, δ a coefficient related to a dynamic of reactivity of a system, essentially related to the one of the liquids of the active lens, and t the time since the change of temperature occurred or started.