A contact lens manufacturer or a contact lens distributor may not:
(1) take any action, by agreement, unilaterally, or otherwise, that has the effect of fixing or otherwise controlling the price that a contact lens retailer charges or advertises for contact lenses; or
(2) discriminate against a contact lens retailer based on whether the contact lens retailer:
(a) sells or advertises contact lenses for a particular price;
(b) operates in a particular channel of trade;
(c) is a person authorized by law to prescribe contact lenses; or
(d) is associated with a person authorized by law to prescribe contact lenses.