Method for determining the feasibility of an ophthalmic lens by an ophthalmic lens manufacturing process comprising: an ophthalmic lens data providing step, a set of surface parameters providing step, an optical parameters providing step during which a set of n optical parameters (P1, P2, . . . , Pn) is provided, n being an integer greater than or equal to 1, each optical parameter Pi being provided with a tolerance value εi, —a feasibility check determining step, during which the feasibility of the ophthalmic lens by the ophthalmic lens manufacturing process is determined by determining if for i from 1 to n: - ɛ i ≤ [ ∑ j = 1 m ⁢ ( ∂ P i ∂ α j ) 0 × Δ ⁢ ⁢ α j ] + A i ≤ ɛ i with ⁢ ⁢ ( ∂ P i ∂ α j ) 0 the value of the derivative of Pi with respect to the jth surface parameter αj on the nominal surface and Δαj the value of the jth surface parameter and Ai a combination of terms of order greater or equal to 2 for each Pi.