(physics) Calculating eye diameter

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Calculating the diameter of the eye based on glasses prescription, such as -2, is not straightforward and cannot be directly determined from it. However, some suggest that the eye's diameter may be approximated using the focal length of the lens and the refractive index of the aqueous humor. The typical radius of the eye is about 9.2mm, with a focal length around 16.67mm, as referenced in the Indiana Reduced Eye Model. Additionally, determining the closest point at which a person can see sharply may provide some indirect insights into eye dimensions. Overall, while there are methods to estimate eye diameter, precise calculations based on prescription alone are not feasible.
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Is it possible to calculate the diameter of the eye from front to back when you what kind of glasses the person needs? Like if someone needs -2 type of glasses is it possible to calculate the eye diameter?

If not would it be possible to determine someones eye diameter by determine the closest point at which the person can see sharp?

Thanks in advance, I've searched everywhere but couldn't find an answer.

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This is what someone gave me to help but i don't know if its useful? I can't contact that person right now.

Thanks in advance.
 
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The diameter of the eye is roughly equal to the focal length of the lens times the refractive index of the goo( can't spell aqueus humor ) inside your eye.

Generally the radius of the eye is taken as 9.2mm and the focal length of the lens 16.67mm - look for "Indiana Reduced Eye Model"
 

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