An improved ocular device used to illustrate common ocular disorders such as nearsightedness, farsightedness, astigmatism and presbyopia. The device includes a light source that forms an optical axis across the length of the device and is subjected to a slide holder and a focusing mechanism. The slide holder exposes an inverted image to the light source, which is then exposed to a corneal lens and vernier lens. Both the slide holder and focusing mechanism can be moved in different positions along the optical axis to focus and clarify the image exposed to the light that is shown on the retinal screen of the device. A vernier lens is also included as part of the focusing mechanism to simulate accommodation as needed. The device can also be used to simulate ocular pathology.