The 'eyeline' should be in the middle of the head, and that is where is eye is centered around. The 'baseline' is a general idea of where the base of the eyes will be if the eyes are completely open. Distances from the chin to the bottom of the nose should be approximately be as long as the distance from the bottom of the nose to the brow. The glint can be singular or double glint. Note the eyelashes do not have to be long, just noticable and in order of length, longest towards the nose, shortest towards the ear.
Eyelashes apply only to the females.
The double line at the top is nonexistent for men. You're gonna need eyebrows, thin lines across the head above the eyes, for short hair. Speaking of ears, noses and hair, this is the second order. Noses in ALL manga are generally just a cuving line down the face ending in a small mountain, sharp at the tip, or just the tip part. The lines are generally made up when the nose terminates at the bottom of the eye.