PRELIMINARY STUDY OF REFRACTIVE SYSTEM IN NEOMERIS PHOCAENOIDES
江豚眼折光系统的初步研究

The anatomical dimension and the optical parameters of the components, such as cornea, aqueous and vitreous, crystalline lens, of the refractive system of Neomeris phocaenoides eye were determined. The calculation of the optical parameters of the schematic eye in Neomeris phocaenoides was carried out. On the bases of the anatomical measurements and calculated results, the refractive state of the Neomeris phocaenoides eye was estimated. The results show that the cornea of Neomeris phocaenoides possesses smaller curvature and lower dioptric poewr, while the crystalline lens possesses stronger dioptric power. The Neomeris phocaenoides has eyes with considerable refractive error (-25.1) which indicates that it is highly shortsighted.The results on the refractive system of Neomeris phocaenoides have been compared with that of some terrestrical mammalian. Some differences between the refractive systems of the aquatic and terrestral mammalian have been discussed.