Spectacle lenses for myopia control – Part 1

Progressives, bifocals, binocular vision and more Are progressive addition lenses and bifocals created equal for myopia control? When do they work and when do spectacles have minimal efficacy? How should we pick which lens type to prescribe, and what’s on the horizon for our non-contact lens wearing young myopes? We know that single vision spectacle lenses provide no useful efficacy …

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Assessing risk of myopia onset and progression

Identifying the pre-myope There are four key principles for assessing risk of myopia onset: Family history – one myopic parent increases risk by three-fold, while two myopic parents doubles this risk again1 Visual environment – less than 90 minutes a day spent outdoors increases risk, especially if combined with more than 3 hours a day spent on near work activities …

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An Ode To My Retinoscope

In May 2019 the professional journal Contact Lens Spectrum published my bi-annual ‘Refractive Focus’ column, entitled ‘An Ode to my Retinoscope’. Click on this link to read about how your trusty ret can help with: Pediatric refractions Diagnosing keratoconus and other corneal irregularities Toric contact lens assessment Multifocal contact lens troubleshooting OrthoK assessment Complex contact lens fitting About Kate Dr …

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Kids, contact lenses, dry eye and binocular vision

Kids and dry eye Only a minimal percentage of children are likely to suffer dry eye symptoms (4%) compared to 56% in adult contact lens wearers.(1) Teens may be more likely to report contact lens related dry eye than younger children,(2) and consideration should be given to any systemic medications which could exacerbate dry eye symptoms, such as acne medications …

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The esophoric myope and contact lenses

When it comes to contact lens corrections for young myopes, the impact of orthokeratology (OK) and multifocal soft contact lenses (MFSCL) on binocular vision is pertinent to visual comfort and understanding mechanisms of myopia progression and control. Oliver’s story Oliver, age 10, was referred with a history of fast, recent myopia progression. His mother was R&L -7.00 and he was …

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Specs to contacts – what happens to BV?

Changing a myope from spectacle to contact lens wear can alter their binocular vision (BV) function. The myope reading through their spectacles experiences base-in prism at near, as demonstrated in the image above, which moves the image further away and decreases vergence demand. Looking away from the optical centre of the lens (while keeping the vertex distance constant) also reduces …

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Four reasons why binocular vision matters in myopia management

Binocular vision is a much neglected (and even maligned?) domain of eye care where I’ve had numerous colleagues say their professional excitement and learning opportunities have been reinvigorated through seeing the clinical imperative and application in practice. Not only does binocular vision assessment add so much more to your clinical picture, and make optometric life more interesting, it could be …

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Latest research: International Myopia Conference 2017, Part 1

The sixteenth, biennial International Myopia Conference (IMC) brought together over 350 myopia researchers from more than a dozen countries to drizzly, chilly Birmingham in September 2017, where the latest research was presented in 45 lectures and more than 150 scientific posters over four days. The session topics covered prevalence, progression and risk factors of myopia, mechanisms such as light exposure …

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Latest research: International Myopia Conference 2017, Part 2

More of the latest from the sixteenth biennial International Myopia Conference (IMC) is below – read here for Part 1. Three more fascinating areas and/or pieces of research presented at IMC, and some bonus material, are below. A more detailed write up, published in Australian industry journal Mivision, can be accessed from the link, which includes relevant references. IMC #4 – …

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