Scleral Lenses for High Myopia

Most short-sightedness is corrected easily with glasses or standard soft contact lenses. For some patients with high levels of myopia, though, standard lens options don’t sit as stably on the eye, or patients find comfort and vision quality harder to achieve — particularly if there’s any accompanying corneal irregularity or previous difficulty with soft lens wear.

Understanding high myopia

Myopia becomes more optically and structurally complex to correct as the prescription increases, partly because higher-powered lenses are physically thicker and heavier than lower prescriptions, and partly because very high myopia is sometimes associated with a longer eye shape that can bring its own considerations for lens fitting and general eye health monitoring, separate from the contact lens question itself.

Why high myopia can be more complex to fit

Strong minus-powered lenses are thicker at the edge than a standard prescription, which can affect how a soft lens sits and moves on the eye. Some patients with high myopia also have a slightly longer, more irregular eye shape, which standard lens designs don’t always account for well.

How scleral lenses can help

A scleral lens’s stability on the eye — resting on the sclera rather than moving with each blink — can offer more consistent vision for patients who’ve found standard lenses uncomfortable or visually inconsistent. Custom design also allows the lens to be tailored to the specific shape and power needed, rather than relying on a limited range of standard soft lens parameters.

Balancing thickness, oxygen delivery and optics

Designing a scleral lens for high myopia involves balancing several factors: enough lens thickness for durability and stable optics, without compromising the oxygen permeability the cornea needs for long-term health. This is one of the more technical aspects of high-prescription scleral lens design, and it’s assessed individually based on your specific power requirements and corneal oxygen needs, rather than using a generic template.

Who this typically suits

These are usually patients for whom simpler options have already been tried:

• High myopia where standard soft lenses haven’t given stable, comfortable vision
• High myopia alongside irregular astigmatism or early corneal changes
• Patients who need more consistent vision than fluctuating soft lens fits have provided

A note on wider eye health

High myopia is associated with an increased lifetime risk of certain retinal conditions, independent of whatever contact lens or glasses correction is used. This is a separate consideration from lens fitting itself, but it’s part of why regular comprehensive eye examinations remain important for high myopia patients alongside any contact lens care.

What to expect from fitting

Fitting for high myopia without other corneal irregularity follows the standard scleral lens process — corneal and scleral topography, diagnostic lens fitting to confirm the power and thickness profile suits your eye, and anterior OCT imaging to check the final fit. Because the underlying cornea is regular in these cases, this fitting is often somewhat more straightforward than fittings for significant corneal disease, though the specific optical calculations for very high powers still require careful attention.

Comparing scleral lenses with other high-myopia options

Beyond scleral lenses, other options for high myopia include continued use of specially ordered high-power soft lenses, corneal RGP lenses, or refractive surgery where appropriate and desired. Scleral lenses tend to become the preferred option specifically when previous lens types haven’t given comfortable, stable vision, or where surgery isn’t suitable or wanted — rather than being presented as automatically superior to every other approach.

What high myopia patients often report

Patients who switch to scleral lenses after struggling with high-power soft lenses often describe two main improvements: more stable, consistent vision throughout the day, and reduced awareness of the lens itself, particularly compared with thicker soft lens designs that can feel noticeable at very high powers. Not every high myopia patient needs to make this switch, but for those who’ve found standard options unsatisfactory, these are the improvements most commonly cited.

Discussing your specific prescription at assessment

Because scleral lens design for high myopia involves specific technical trade-offs around thickness and oxygen delivery, it’s worth having a detailed discussion of your exact prescription and any previous lens experiences at your assessment. This allows the design process to start from an informed position rather than a generic template, particularly important at the higher end of the myopia range.

A realistic view of the process

As with other scleral lens fittings for high refractive error without corneal disease, most patients find the process itself reasonably straightforward once the initial assessment is complete — the added complexity is mainly in the technical lens design calculations behind the scenes, rather than a more demanding day-to-day fitting experience for you as the patient.

Bringing your lens history to your assessment

If you’ve previously worn high-power soft lenses or corneal RGP lenses, bringing details of that experience — what specifically didn’t work, whether it was comfort, stability or vision quality — helps focus your assessment on the aspects most relevant to your situation, rather than starting from a completely blank slate.

As with high astigmatism, high myopia without accompanying corneal disease is often one of the more predictable scleral lens fittings, since the underlying corneal shape being assessed is regular rather than irregular.

Life with a stable scleral lens for high myopia

Patients who switch to scleral lenses for high myopia often describe two related benefits day-to-day: greater confidence during physical activity, since the lens is far less likely to dislodge than a high-power soft lens might, and more consistently sharp vision throughout waking hours, without the subtle centring shifts that can affect thicker soft lens designs. For patients who lead active lifestyles or simply want one less thing to think about during the day, this stability is often the deciding factor.

Making an informed decision

As with the other high-prescription conditions in this cluster, the right path for you depends on an actual assessment of your specific eyes and needs, not a general comparison of lens types. If you’re finding your current correction genuinely unsatisfactory, an assessment including topography will give you a clear, individual answer about whether scleral lenses are likely to help.

A final consideration

High myopia alone, without any accompanying discomfort or dissatisfaction with your current correction, isn’t in itself a reason to pursue scleral lenses — many patients with very high prescriptions are perfectly well served by standard soft lenses or glasses for their entire lives. This article exists for the smaller group who’ve found standard options genuinely inadequate, and for whom a more stable, custom-designed alternative is worth exploring, ideally following a proper assessment rather than a decision made in the abstract.

High Myopia FAQs

Do I need scleral lenses just because I have high myopia?

Not usually — most high myopia is corrected well with glasses or standard soft lenses. Scleral lenses tend to be considered when standard options haven’t given stable, comfortable vision, or where there’s additional corneal irregularity.

Are scleral lenses heavier or thicker for high myopia prescriptions?

Lens thickness is adjusted as part of the custom design process to balance oxygen permeability, durability and optical quality for your specific prescription — this is assessed individually rather than using a one-size approach.

Can scleral lenses correct high myopia and astigmatism together?

Yes — many scleral lens designs correct both myopia and astigmatism in a single custom lens, including toric peripheries where needed for scleral asymmetry.

Does high myopia mean I need more frequent eye health checks?

High myopia is associated with increased risk of certain retinal conditions over a lifetime, so regular comprehensive eye examinations are recommended regardless of your contact lens choice — this is separate from routine scleral lens fit checks.

Book a Scleral Lens Assessment

Call the practice on 0141 943 3300 to arrange a scleral lens consultation.