Choosing an instrument to measure axial length

The value and importance of axial length measurement in myopia control is growing. As you offer myopia control to more patients, you could start to consider which instrument to use to measure axial length. How do ultrasound and interferometry instruments compare in accuracy? What about the new generation combination instruments? Here we address the practicalities of axial length measurement.

A mismatch between myopia and axial length

This case study describes two examples of myopia and axial length mismatch – a low myope with long eyes and high myope with short eyes. With axial length becoming more available and crucial in myopia management, it’s important to understand that the relationship between refraction and axial length isn’t always consistent. Find out more regarding the other ocular components that can influence refractive error.

Measuring the whole eye in myopia

Axial length (AXL) has been well established as the critical measurement in myopia control research. The measurement accuracy and link to disease risk make AXL increasingly important in a clinical setting. But what else should we measure in the myopic eye? Does the cornea change as well? Will we end up doing away with refraction? Read more on measuring the whole eye in myopia.

An hyperopic myope? Marfan syndrome and aphakia.

When is a hyperope actually a myope? This case presents an aphakic patient with Marfan syndrome and an extremely long axial length, who needs to be managed like a high myope. This post also discusses a variety of pharmacological approaches to myopia management, based on a fascinating case presented in the subsequent Facebook discussion.

Posterior Scleral Reinforcement as a means of myopia control

Pathologic myopia is one of the major causes of blindness worldwide. Degenerative changes associated with high myopia, including posterior staphyloma formation and scleral thinning, are caused by the progressive elongation of globe axial length and stretching of the sclera, choroid and retina. The aim of this meta-analysis was to investigate and quantitatively define the efficacy of PSR in controlling axial elongation and refraction progression.

A tale of two studies measuring change to axial length in myopia

Being able to assess myopia progression in a similar way to height and weight using growth curves is beneficial for both practitioners and patients as it provides a comparison against a calculated average, helping to predict future high myopes and track progression and control outcomes. How to growth charts from European and Asian studies compare? We explore the comparisons, advantages and disadvantages of using growth charts for axial length in myopia.

High Myopia in Childhood

High myopia in childhood – special considerations and safe management

Half of children with high myopia have an underlying systemic condition: ophthalmology co-management, best optical corrections, parental education and eye health monitoring are crucial. It’s also important to offer myopia control strategies while also being aware of the limitations of the evidence base. This blog provides guidance on appropriate ocular health and optical management of children with more than 5-6D of myopia.

When you have low myopia and high axial length

Usually myopia and axial length are correlated. What does it mean when your patient has low myopia and high axial length? This case discusses various correlations between ocular and individual parameters and axial length.