Editing Fish hook (section)

=== Eyes ===
[[File:FishHooks.JPG|thumb|(Clockwise from top) A standard J-hook with straight eye, a [[circle hook]] with down-turned (outward angled) eye, and an eyeless Japanese ''[[Tenkara fishing|Tenkara]]'' hook with a spade end.]]
[[Image:HookEyes.jpg|thumb|Up-turned, down-turned and straight hook eyes]]
The '''eye''' of the hook is the widened ring/loop at its proximal end, with a hole where the fishing line (typically the [[fishing line#Sections|leader line]]) is passed through (threaded) for fastening via [[knot]]-tying. Hook eye design is usually optimized for either strength, weight and/or presentation. Typical eye types include:
* '''Ringed eye''' or '''ball eye'''  — a circular loop often with a closely opposed gap between the loop end and the loop base;
* '''Brazed eye''' — like a ringed eye, but the loop end is welded shut fully without any gap;
* '''Tapered eye''' — like a ringed eye, but with a pointed loop end;
* '''Looped eye''' — the loop end is elongated with the extended portion laid parallel to the hook shank;
* '''Needle eye''' — the eye hole is ellipsical, or just a narrow slit.<ref>{{cite web|url=https://fishingbooker.com/blog/fishing-hooks-101-parts-sizes-types/|title=Fishing Hooks 101: Parts, Sizes, Types, and More|date=2021-09-15|publisher=Fishing Booker blog|accessdate=2022-09-01}}</ref>
Most hook eyes are directly knotted to the fishing line and are responsible for relaying the pulling force from the line onto the hook body, but sometimes the line is passed cleanly through the eye and tied directly onto the shank instead of onto the eye loop — this is known as a [[snell knot]] or "snelling", and the eye does not take part in transferring any force, merely serving to restrict line wobbling and knot sliding.  In [[fishing lure]]s, it is also not uncommon to see the hook being linked to the lure via a [[circle cotter|split ring]] through the eye, which allows the hook more [[range of motion]].

Hook eyes can also be categorized into three types according to the angulation of the loop plane against the shank, where hooks with bent/"turned" eyes being more optimized for snelling:
* '''Straight''' — the eye is in-line with the shank;
* '''Up-turned''' — the eye is angled ''away from'' the hook point;
* '''Down-turned''' — the eye is angled ''towards'' the hook point.

Some hooks, such as the traditional Japanese ''[[Tenkara fishing|Tenkara]]'' hooks, lack any opening for the line to be threaded, and are thus '''eyeless'''.  Eyeless hooks instead have a widened "[[spade]] end" to help snelling the line onto the shank without slipping.