Commentaires sur : 5. Principal planes: explanations https://www.gatinel.com Ophtalmologie Tue, 18 Aug 2026 20:26:43 +0000 hourly 1 Par : JC Kim https://www.gatinel.com/recherche-formation/paraxial-optics-for-iol-power-calculation/principal-planes-explanations/comment-page-1/#comment-47327 Thu, 16 Sep 2021 00:35:57 +0000 https://www.gatinel.com/?page_id=14838#comment-47327 Hello Dr.Gatinel, is there any mathematical derivation of the equation: SaP = f*d/f’p?
Intuitively, I think I could understand that « the smaller f is, the greater the total power of the lens is compared to the power of the opposite face » but not certain whether I am really sure about that.
This part might be the biggest obstacle for me to understand the thick lens paraxial model principle.

Many thanks to your elaborative works.

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