Lens

Structure of Lens

• Like onion
• BAsement membrane outside
• BM attached to Zonular Fibres
• Epithelium only at the side of Cornea when reaches the Equatoral side , elongates and moves to the centre to form Onion leafs
• Elongated Epithelium lacks Nucleus,Oragnales filled with crystalins

Lens Accumodation

graph LR
    subgraph Long-distance 
    X1[Long Distance View] ==>|need more light and more focus | X2[sphinter relax];
    X2 ==> X2a[Increase in hole of sphincter];
    X2a ==>x2b[Lens  streached];
    x2b ==> X2c[distance Light focused];
    end

    subgraph Nearvision
    Y[Nearby object] ==>|only need few light| Y2[Sphincter Tight];
    Y2 ==> Y2a[Decrease in Sphincter hole size];
    Y2a ==>Y2b[ Lens relaxed];
    Y2b ==> Y2c[Few light focused];
    end