Are there any one who is using Bahmni along with OpenMRS and ERP for Ophthalmology

I am looking for configuring the system for Ophthalmology purpose.

I would like to understand, how can we incorporate power of the Eye in prescription. And also, if that need to be ordered directly to the store, how do I enable it in ERP.

Can any one in the forum can through some light on the above.

Thanks