.ui-input__field {
    position: relative;
}
.show_pass {
    position: absolute;
    bottom: 4px;
    right: 0;
    cursor: pointer;
}

.show_pass {
    width: 22px;
    height: 19px;
    background: url("img/visibility_off.png") no-repeat;
}
.show_pass.show {
    width: 22px;
    height: 19px;
    background: url("img/visibility_on.png") no-repeat;
}