Diane
Are you of the belief that 'keyword density' is important for SEO ie inclusion and repeating your chosen keywords in your text paragraphs. If, so think again, that's no longer a ranking factor. You don't need to do 'messy writing' or loads of keywords over the homepage. I would also agree with Ryan regarding your url. You need to get this right from the start. (I should know with an eyewear site called 'pretavoir')
As regards keywords, have you used the basic google keyword tool? Do this first before choosing a domain/url. You need to know your figures before you start. The 'KW Tool' can be invaluable.https://adwords.google.co.uk/o/Targeting/Explorer?ideaRequestType=KEYWORD_IDEAS&__u=9115528870&__c=3941445370&__u=9115528870&__c=3941445370&ideaRequestType=KEYWORD_IDEAS#search.none

