IPB Morphology - An Important Iris Sign for Modern Iridologist !

Please identify the above IPB structure, what letter sign can you imagine ? What does it carry a genetic data and weakness tendency to this person ?.. Suggest that a professional modern iridologist should be prepared to learn, capture and understand the important skill of identifying IPB structures & it morphologies, especially analyzing in advanced level of Haematogenic Iris Constitution also with other iris constitutions as well !