Eye color differences between Polish regions

[Peterski]

Sample = 2739 Polish men born between 1905-1939, assigned to regions based on birthplaces.

Light eyes = shades 9-10, 12-16 in the Martin scale.
Mixed eyes = shades 7-8, 11 in the Martin scale.
Dark eyes = shades 1-6 in the Martin scale.

North-East Poles (n=156):

Light eyes = 44.8%
Mixed eyes = 47.3%
Dark eyes = 7.9%

North-West Poles (n=983):

Light eyes = 52.3%
Mixed eyes = 39.9%
Dark eyes = 7.8%

Central Poles (n=668):

Light eyes = 43.8%
Mixed eyes = 45.3%
Dark eyes = 10.9%

South-West Poles (n=690):

Light eyes = 42.7%
Mixed eyes = 47.7%
Dark eyes = 9.6%

South-East Poles (n=242):

Light eyes = 38%
Mixed eyes = 47.5%
Dark eyes = 14.5%

Source (in Polish)

[Ülev]

her beautiful black eyes
https://youtu.be/2wmjYNMJxHM

I don't see that much light eyes when i am watching polish politicians on tv

[cyberlorian]

Sample = 2739 Polish men born between 1905-1939, assigned to regions based on birthplaces.

Light eyes = shades 9-10, 12-16 in the Martin scale.
Mixed eyes = shades 7-8, 11 in the Martin scale.
Dark eyes = shades 1-6 in the Martin scale.

North-East Poles (n=156):

Light eyes = 44.8%
Mixed eyes = 47.3%
Dark eyes = 7.9%

North-West Poles (n=983):

Light eyes = 52.3%
Mixed eyes = 39.9%
Dark eyes = 7.8%

Central Poles (n=668):

Light eyes = 43.8%
Mixed eyes = 45.3%
Dark eyes = 10.9%

South-West Poles (n=690):

Light eyes = 42.7%
Mixed eyes = 47.7%
Dark eyes = 9.6%

South-East Poles (n=242):

Light eyes = 38%
Mixed eyes = 47.5%
Dark eyes = 14.5%

Source (in Polish)

It is interesting that Central Polish have dark eyes 1.3 percent more than Southwestern Polish.