Is this what you would have said?<br/><br/>The is a slit in the iris.<br/><br/>What if the piece missing doesn't extend to the outer limit of the iris like in the photo but there is a circular piece missing in the iris?<br/><br/>How would you express both so that people could understand without a picture?<br/><br/>Ps Is the choice of words correct and natural? Especially the underlined bit?<br/><br/>What if <u>the piece missing doesn't extend to the outer limit/edge</u> of the iris like in the photo but there is a circular piece missing in the iris?<br/><br/>Thank you