Perfect pocket training and practice device is a circular stand of a desirable circumference representative of the perfect pocket of a turn around barrels, poles or other course markers used for performance horse racing competition. The fastener includes a fastening portion which is actuated to fasten by way of application of a sufficient actuating pressure on an actuating surface of the fastening portion; and a pressure-sensitive substance associated with the actuating surface such that the actuating surface visibly changes color after the sufficient actuating pressure is applied to the actuating surface. A plurality of pads are formed on a non-display region of the substrate. Thereafter, an eyelash extension is adhered to the eyelash that is separated from the eyelash group, thereby providing a user with an eyelash group and an eyelash extension applied to an actual eyelash.