I encounter this a lot, a nothing makes me sadder than to see a great setup where the model looks like she's in pain. Aside from trying to use dark-eyed models for this, I do a few things. 1) I try to wear a dark shirt (and I'm a large guy [img]/ubbthreads/images/graemlins/grin.gif[/img]) to give her an "eye rest". 2) You will find that if you're shooting with the sun over your back (in her face) you get better results the lower the sun goes - the more level it gets to the horizon. This is partly because the light is bouncing less off the sun or water, which doubles the impact to her, and partly because it is less intense as it starts to set. 3) Most important - if possible, try to shoot when the sky behind you (where the sun is) is as clear as possible. On an overcast or cloudy day, the sky turns into a giant white softbox which no one can look into. Try staring at a blank white wall that is in direct sun for a while and you'll understand. 4) If the model has real problems, try to position yourself so you are not right in line with the sun, move a few degress off angle. That way she won't have to look right into the sun, and you might get some more interesting shadows. 5) If its just impossible, then change the angle and the look competely - so a side shot, or a flash fill, or just have her close her eyes and put her head back. There's no point in shooting a shot that makes you want to cry too.
Here's a sample from a shoot in Cabo with very late sun, slightly off to the side so that all the girls could keep from squinting. BTW, I'm IN the pool, up to my neck. Fortunately I didn't have to tread water, I was standing on my assistant's shoulders. [img]/ubbthreads/images/graemlins/grin.gif[/img]
Andy Pearlman Studio