Here is an interesting opinion from a Saudi Arabian mullah:
Saudi cleric favours one-eye veil
The two-eyed look remains too seductive for Sheikh Habadan
A Muslim cleric in Saudi Arabia has called on women to wear a full veil, or niqab, that reveals only one eye.
Sheikh Muhammad al-Habadan said showing both eyes encouraged women to use eye make-up to look seductive.
The question of how much of her face a woman should cover is a controversial topic in many Muslim societies.
The niqab is more common in Saudi Arabia and the Gulf, but women in much of the Muslim Middle East wear a headscarf which covers only their hair.
Sheikh Habadan, an ultra-conservative cleric who is said to have wide influence among religious Saudis, was answering questions on the Muslim satellite channel al-Majd.
I wonder why women should try to make themselves invisible to men so as not to arouse them. The easier option would be to let women go free and castrate horny men instead. We can make a beginning with this mullah.