My wife refuses to remove her spectacles during intercourse…..please help?

my wife is 21 years old and was a virgin before marriage. She wears thick spectacles of number approximately -5.00 in both of the eyes. I have tried many times to convince her to take of the spectacles for love making but she is refusing. She has never put lens and is saying that she feels blindness without spectacles. I understand her issue but as she is on heavy side we can only perform few moves and positions. The spectacles always are falling and breaking under her weight. therefore the spectacles make us unable to perform any enjoyable positions. Please note i am not against her spectacles …..i allow her to wear them for full time purposes….i also do not mind her weight…..but both together reduce the chances of performing positions of pleasure…..as the weight cannot be lessened i request her to make love without spectacles but it is futile….is any other indian man in such a position……please reply with suggestion