Keratoconus is a noninflammatory, progressive, bilateral thinning disease of the cornea. It is characterized by the development of a corresponding protrusion with an apex often located centrally or in an inferior eccentric position. The treatment of keratoconus depends on the severity of the disease. In the disease’s early stages, spectacles and contact lenses are the usual treatment modalities. In more advanced cases, with severe corneal irregular astigmatism and stromal opacities, contact lenses may no longer improve the visual acuity and penetrating keratoplasty (PKP) may be required. PKP has many disadvantages the most important of them are endothelial rejection and prolonged visual rehabilitation. Deep anterior lamellar keratoplasty (DALK) is a relatively new technique to achieve the good results of PKP but with avoiding its drawbacks. This study was conducted to evaluate the outcomes of DALK using the "Big Air Bubble Technique". 30 eyes of 30 patients were included in the study. Outcomes revealed good visual outcome of DALK using the previously mentioned technique with 80% of eyes achieving a best corrected visual acuity better than or equal to 6/12, also there was minimal complications and postoperative astigmatism and keratometric readings were acceptable.