 So this is the next instrument which is used in ophthalmic surgery. This is called the strebismus hook or the muscle hook or the squint hook. As the term implies, it is used to hook up one of the extraocular muscles during squint surgery. Now if you were to take a look at this instrument more closely, we notice that I am holding the stem of the instrument and this is the portion which is used to hook up the muscle. Now there are two special noteworthy points about this end of the instrument. One, we can see that it is formed a double angulation. This double angulation is the actual hook which is responsible for hooking up the extraocular muscle. And the second point that we notice is the tip. The tip is flattened sideways that this has been designed in such a way that it can be inserted under the insertion of the muscle where the muscle is inserted onto the globe and hook up the muscle. Though there is no comparison but sometimes there may be theoretically a confusion between this instrument, the strebismus hook and the lens expresser. The lens expresser is an instrument which is used to express out the cataractess lens during cataractess surgery. The difference is the lens expresser, the angulation is at right angles and the end is not flattened sideways but it is rounded. So this is a strebismus hook or a muscle hook or a squint hook which is used in strebismus surgery. Stay tuned for the next instrument in ophthalmic surgery.