Essilor International only has eyes for eyes. Banking on the fact that one-fifth of the world's population wears glasses, the company is a leading maker of ophthalmic products and supplies, particularly corrective lenses. Its Varilux progressive lenses have become a top choice for people needing bifocals, and the firm is renowned for developing lighter, more durable lenses. The company's products treat the common sight problems myopia (nearsightedness), hyperopia (farsightedness), astigmatism and presbyopia (reduced ability to change focus from far to near). Essilor distributes its lenses through a global network of about 250 company-owned prescription laboratories, as well as through independent labs.