The long-term objectives of a contact lens fit are to meet metabolic requirements of the corneal tissue and reduce hypoxic risks. The patient needs an increased lens vault to properly compensate for the lens settling throughout the day. This hybrid lens shows a mild amount of corneal clearance (41 μ m). An important mark of expertise in all contact lens specialists is whether they use the best available tools of the trade and stay both well equipped and well versed in their product knowledge.įig. But these tools will help you solve problems, save time and fine-tune results to give each patient the most customized experience possible. Strictly speaking, you do not need any of these devices to be successful with scleral lenses in a number of routine cases. This article walks through five key steps clinicians should take to successfully complete a specialty contact lens fitting and explains how several newer diagnostic instruments can be clinically helpful for novices and veterans alike. 6 To make matters worse, slit lamp findings alone do not usually offer sufficient clinical clues for clinicians who are looking to take advantage of the latest lens customization concepts.įortunately, numerous technologies are available to help overcome some of these challenges and deliver optimal results. Consequently, if a scleral GP cannot be customized to align with these anatomical features, fitting- and vision-related adverse reactions may develop. The on-eye position and associated fitting characteristics of scleral lenses are heavily influenced by the corneo-conjunctival junction angle and scleral shape profile. However, as corneal GP technology advances, new lens designs-like the design of a scleral lens, for example-make it possible to improve initial lens comfort and reduce adaptation time. This is primarily due to the perceived extensive chair time and potential patient discomfort with corneal GP lenses. While specialty lenses are becoming more popular, fitting them can sometimes intimidate clinicians who are less familiar with custom designs. ![]() 3-5 This finding especially holds true for scleral lenses specifically. 1,2 As such, global clinical trends demonstrate a growing rate of GP contact lens use. ![]() Modern specialty lenses, especially scleral-fit GP lenses, offer better outcome expectations for patients with a wide range of visual and clinical needs-from optical rehabilitation in patients with corneal irregularities to therapeutic protection in patients with dry eye and other ocular surface diseases. Even though soft contact lenses dominate the market, gas permeable (GP) lenses remain essential for many patients, providing superior optics, durability, higher oxygen transmissibility and a lower propensity for surface deposits and microbial inoculations within the GP lens matrix.
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