Orthokeratology or Ortho-K is one of our practice’s speciality interests. Our slogan, “No Specs, No Contact Lenses, No Kidding”, says it all.

Ortho-K, or Orthokeratology, presents a compelling alternative to conventional eyeglasses or contact lenses and stands as a safe and effective substitute for LASIK surgery. It particularly distinguishes itself as the most potent means for myopia control. The impetus for pursuing myopia control stems from the escalating prevalence of children requiring corrective eyewear compared to a generation ago. This surge is a direct consequence of heightened exposure to near tasks, such as prolonged computer and smartphone usage, along with extensive gaming. Alarmingly, projections indicate that by the year 2050, nearly half of the global population will grapple with myopia, or near-sightedness, compared to the present statistic of 23% worldwide.

[Sources: Global Prevalence of Myopia & High Myopia, Temporal Trends from 2000 through to 2050; Brien Holden et al.]

[Sources: Global Prevalence of Myopia & High Myopia, Temporal Trends from 2000 through to 2050; Brien Holden et al.]

How does Ortho-K function, you may wonder? This innovative treatment entails the nightly use of specially designed lenses that gently exert pressure on the central cornea, effectively reducing the eye’s front-to-back length. As the eye becomes less myopic or short-sighted with this manipulation, the degree of correction is directly proportional to the pressure applied. It’s essential to note that this effect only persists for a single day, necessitating nightly wear of the lenses for consistent outcomes. Consequently, the procedure is entirely reversible and, by extension, inherently safe.

Ortho-K has garnered acclaim among a diverse array of individuals since its introduction in 2003. Our satisfied patients hail from various backgrounds and seek Ortho-K for an assortment of reasons, extending beyond myopia control and dry eye management. Many appreciate the newfound freedom Ortho-K affords, making it especially convenient for frequent swimmers and avid travellers. Moreover, these lenses boast a lifespan of two years, alleviating the need for recurrent replacements every 3 to 6 months.

Utilising advanced technology like a Corneal Topographer (as described in the Advanced Technology section), we capture a detailed corneal map, which serves as the basis for creating a customized virtual lens with specialized software. These lenses are worn overnight, and subsequent corneal topographies track the changes over time.


Corneal topography maps showing before and after Ortho-K lenses were worn. The second pic was taken after two weeks of wear. Treatment can take slightly longer depending on the prescription. Generally under -4.00 reaches full correction in less than two weeks.

The successful candidates we have treated with Ortho-K since its inception in 2003, have come from all walks of life and for many reasons, not just myopia control and dry eyes. Many love the freedom that Ortho-K offers. It is ideal for people who swim regularly, as well as for travellers. The lenses last 2 years so there’s no need to collect stock every 3 to 6 months.


Some more Ortho-K examples. The last two were taken only after 20 minutes wear.

For more on Ortho-K, take a look at this article linked to our blog page: http://www.paulmoldovanos.co.za/ortho-k-blog/