For patients who have lost an eye as a result of trauma or carcinoma, accurate replacement with an ocular prosthesis that is symmetrical to the natural eye is essential. Rehabilitation of a missing eyeball with an ocular prosthesis is a technique that has a significant role in the field of maxillofacial prosthetics, which improve facial esthetics, physical, psychosocial, and mental well-being of the patient. An ocular prosthesis can be either prefabricated or custom made. Prefabricated ocular prostheses come in a range of standard sizes, contours, forms, and colors. A 60-year-old female reported with a chief complaint of ill-fitting eye prosthesis, which was given 10 years back. On review of the stock eye prosthesis, it was found that the iris and sclera color failed to match with the contralateral eye and improper fit. The treatment plan was decided for a replacement of old stock eye prosthesis with a custom-made ocular prosthesis. The present case report was different from the previous data on the custom-made prosthesis, which was fabricated using various techniques. This case report describes a method for recording the width and height of the original iris more accurately using the Hanau technique and transferring it to the prosthetic eye of the patient. The technique described in this case report is an easy and cost-effective method which meets the technical requirements of the clinician and results in a more esthetically pleasing and accurate prosthetic outcome.