FEW GUIDE LINES- LOOKING AT NA-MEHRAM

According To Grand Ayatullah Seestani 

It is haraam for man to look at the body or hair of the Non-Mahram women, regardless of whether it is with the intention of pleasure or not, and whether there is a fear of falling into sinful act or not. It is also haraam to look at the faces and the arms, upto the wrists, of such women with the intention of pleasure, or if there is fear of falling into sinful act, and the recommended precaution is that one should not look at their faces or arms even without such an intention. 
Similarly, it is haraam for a woman to look at the body of Non-Mahram man, except places which are customarily not covered, like, his face, hands, head, neck and feet. She can look at these parts of a man without the intention of deriving any pleasure, or if there is no fear of being entrapped in any sinful act. 

To look at the body of a woman who would not care for Hijab, even if she were advised, is not haraam, provided that it does not lead to sinful act or sexual pleasure, and excitement, nor is it with that intention; and in this rule, there is no distinction between a Muslim and a non-Muslim woman; and also between those parts, like their faces, their hands which they normally do not cover, and other parts of their bodies. 

Woman should conceal her body and hair from a man who is non-Mahram, and as an obligatory precaution, she should conceal herself even from a Na-baligh boy who is able to discern between good and evil, and could probably be sexually excited. But she can leave her face and hands upto wrists uncovered in the presence of Na-Mahram, as long as it does not lead him to casting a sinful, evil glance or her to doing something forbidden; for in both these cases, she must cover them. 

It is haraam to look at the private parts of a baligh Muslim, even if it is seen behind the glass or reflected in the mirror, or clean water etc. As an obligatory precaution, it is also haraam to look at the genitals of a non-Muslim, and of a discerning Na-baligh child. However, wife and her husband can look at the entire body of each other. 

If a man and woman who are Mahram of each other, do not have the intention of sexual pleasure, they can see the entire body of each other excepting the private parts. 

A man should not look at the body of another man with the intention of sexual excitement, and also, it is haraam for a woman to look at the body of another woman with the intention of sexual excitement. 

A man who is acquainted with a Na-Mahram woman, should not, as a precaution, look at her photograph etc., provided that the woman is not a heedless, commonplace person