De m
"One of the most striking result of a diet high in melange is the "eyes of the Ibad", the characteristic "blue on blue" eye color : the whites and irises turn a deep blue. The precise mechanism of action is not known, but it is thouht that certain of the components of melange have affinity for the stroma of the sclera. The 640 A axial periodicity of the collagen fibrils may entrap the melange components deposited because of the relative deficiency of water-binding substances in the sclera. The oblique arrangement and variability of collagen fibril diameter also serve to maintain the entrapment of the melange components.Visual activity is not reduced by the deposition of blue pigment. In fact, in the white sun light of Arrakis, the pigment acts as a blue filter, increasing contrast and enhancing vision.The incomplete knowledge of the structure of melange prevents us from knowing all the interactions of this unique compound with the human body."
"If quantities in excess of 2 grams daily per 70 kg of body weight are ingested, severe addiction is encountered. Withdrawal from the spice from an addict results in insanity and eventual death due to the action of the breakdown products of K-K celles on the other cells of the Central Nervous System"
Donc : cornée ? Liquide lacrymal ?J'aime bien dans la version DE l'idée que ce changement de couleur puisse s'accompagner d'une acuité plus développée, ce qui serait bien utile sur une planète où ça tape 365 jours par an (où les lunettes de soleil ne sont jamais évoquées) et où il doit être difficile de bien faire les contrastes entre tous les tons de sable...