There is no single “best” scleral lens brand or design for every patient. The right scleral lens is the one designed for the individual eye, evaluated after it settles, and shown during follow-up to provide an acceptable relationship with the cornea, limbus, conjunctiva, and sclera while meeting the patient’s visual and ocular-surface needs.
Two people with the same diagnosis may need different lens diameters, vaults, landing zones, materials, powers, or optical designs. Technology can provide useful measurements, but the result still has to be assessed on the eye. Dr. Edward Boshnick uses the examination, ocular imaging, diagnostic lens findings, symptoms, visual goals, and follow-up response to decide which approach is reasonable for each patient.
What Determines Which Scleral Lens Is Right for You?
A lens name alone does not determine whether it will work well. A specialty evaluation considers several connected questions:
- Why is a scleral lens being considered? The fitting priorities can differ for keratoconus, severe dry eye, corneal scarring, a transplant, post-LASIK or post-RK distortion, ocular surface disease, or prior contact lens intolerance.
- What is the shape of the eye? Corneal curvature, sagittal height, limbal profile, scleral asymmetry, elevations, depressions, and localized obstacles can influence lens geometry.
- What does the ocular surface need? Tear-film stability, epithelial health, eyelid interaction, conjunctival tissue, inflammation, and sensitivity affect candidacy and monitoring.
- What happens after the lens settles? Clearance and landing characteristics can change during wear. A lens that looks acceptable immediately after application may need a different assessment later.
- What visual problem remains? Ordinary prescription error, lens flexure, decentration, residual astigmatism, tear-film instability, or higher-order aberrations may require different solutions.
- Can the lens be handled and cared for safely? Application, removal, filling, cleaning, disinfection, and follow-up are part of the prescription.
For a broader overview of indications, limitations, care, and safety, read the Eye Freedom guide to scleral lenses.
Are Diagnostic-Set, Scan-Based, and Impression-Based Lenses Ranked From Basic to Best?
No. These are different ways to collect information and begin a design. A more complex manufacturing pathway is not automatically better for a particular eye.
Diagnostic-Set Fitting
A practitioner applies a diagnostic lens filled with preservative-free saline, allows it to settle, and evaluates corneal and limbal clearance, scleral landing, edge relationship, centration, movement, surface quality, comfort, and vision. The observations guide changes to the ordered lens.
This approach is not simply “off the shelf.” The final lens can still be highly customized. Its success depends on careful diagnostic evaluation, appropriate parameter changes, and follow-up rather than the fitting pathway’s label.
Scan-Based or Profilometry-Guided Design
Corneo-scleral profilometry can measure portions of the anterior eye surface and help describe asymmetry that may not be represented by a rotationally symmetric design. The measurements may support toric, quadrant-specific, or more customized landing zones.
A scan does not make the examination unnecessary. Coverage, fixation, tear quality, eyelids, instrument limitations, and data quality can affect the measurement. The manufactured lens still needs to be evaluated on the eye.
Impression-Based Design
An impression-based process records the contour of the exposed ocular surface and can be considered for selected eyes with pronounced asymmetry, elevations, depressions, surgical changes, or other anatomy that makes conventional fitting difficult. Eye Freedom uses EyePrintPRO impression-based scleral lens technology when the examination supports that approach.
Impression capture does not guarantee comfort, vision, wearing time, or a final design without refinement. The eye, lens, handling, and ocular response must still be evaluated.
Does the Most Advanced Optical Design Automatically Give the Best Vision?
No. The physical fit and lens stability come first. Many patients obtain useful vision with conventional sphero-cylindrical optics. A practitioner may consider front-surface toric, multifocal, or other optical options when the patient’s measurements and visual needs justify them.
Wavefront-guided scleral lens optics may be evaluated for selected patients with measurable higher-order aberrations that remain after the lens fit and position are stable. They are not required for every person with keratoconus or an irregular cornea. If the lens rotates or decenters differently from the measured position, a sophisticated optical correction may not align as intended.
What Does Dr. Boshnick Evaluate Before Choosing a Design?
The sequence varies by diagnosis, but a careful assessment may include:
- History and goals: diagnosis, symptoms, prior surgery, current lenses, medications, ocular-surface treatment, handling experience, and important visual tasks.
- Eye-health examination: cornea, conjunctiva, eyelids, tear film, and other structures relevant to lens wear.
- Shape and structural measurements: corneal topography, tomography, profilometry, or anterior-segment OCT when those measurements answer a clinical or fitting question.
- Diagnostic lens evaluation: clearance, landing, edge alignment, centration, stability, surface wettability, and tissue response after settling.
- Vision through the lens: over-refraction and investigation of residual blur, ghosting, glare, halos, or variable vision.
- Handling and care: safe application, removal, filling, cleaning, disinfection, and storage.
- Follow-up: how the lens performs during real wear and how the eye appears during wear and after removal.
The scleral lens fitting guide explains these steps in more detail, including planning for patients who travel for an evaluation.
When Might a More Customized Landing Zone Be Considered?
A toric, quadrant-specific, scan-based, or impression-based landing zone may be considered when a simpler geometry shows localized edge lift, compression, impingement, instability, rocking, unwanted rotation, decentration, or difficulty navigating an anatomical elevation or depression. The decision should be based on measurable findings rather than the assumption that more customization is always superior.
Different fitting problems can produce similar symptoms. Midday fogging, variable vision, redness after removal, or reduced wearing time may relate to fit, surface deposits, tear exchange, ocular-surface inflammation, care products, application technique, or another cause. Changing the lens design without identifying the cause may not solve the problem.
Questions to Ask When Comparing Scleral Lens Options
- What diagnosis or measurable problem is the lens intended to address?
- How will the practitioner assess the lens after it has settled?
- How are the cornea, limbus, and scleral landing relationship evaluated?
- What happens if the first ordered lens needs refinement?
- How will residual blur, glare, ghosting, or fogging be investigated?
- What application, removal, cleaning, and disinfection training is included?
- What follow-up schedule is planned, and how are urgent symptoms handled?
Avoid choosing solely from advertising claims such as “perfect fit,” “guaranteed comfort,” or “best vision.” No device, scan, impression, brand, or credential can guarantee candidacy or an outcome.
Frequently Asked Questions
Is there one best scleral lens brand?
No. Scleral lens systems differ in available diameters, materials, landing-zone options, optical designs, and manufacturing methods. The appropriate choice depends on the individual eye and must be verified through examination and follow-up.
Are scan-based scleral lenses always better than diagnostic-set lenses?
No. Scan-based measurements can be helpful for selected anatomy, but many eyes can be fitted appropriately with diagnostic lenses and customized parameter changes. Measurement quality and on-eye evaluation remain important with either method.
When might an impression-based scleral lens be considered?
It may be considered for selected eyes with complex asymmetry, elevations, depressions, surgical changes, or repeated fitting difficulty. An examination is needed to determine whether impression-based design offers useful information for that eye.
Do all people with keratoconus need wavefront-guided lenses?
No. Many people with keratoconus obtain useful vision with conventional custom scleral optics. Wavefront-guided correction is generally considered when measurable higher-order aberrations remain and the lens fit and position are stable enough to support the optical design.
Can the right lens be chosen from records or a remote consultation?
Records can help Dr. Boshnick understand the history, but candidacy, measurements, diagnostic lens testing, and the final fit require an in-person eye examination. A remote conversation cannot show how a lens settles or how the tissues respond.
How can I request an evaluation with Dr. Boshnick?
Use the Eye Freedom evaluation form or call 305-271-8206. Bring current lenses, lens parameters, prescriptions, corneal imaging, surgical records, and a list of eye drops or medications when available.
Medical and Professional Sources
- Scleral Lens Education Society: What are scleral lenses?
- Guide to scleral lens fitting
- Scleral lens prescription and management practices: emerging consensus
- Effect of landing-zone toricity on scleral lens fitting characteristics and optics
- Review of scleral lens indications, complications, and outcomes
This page is educational and does not determine candidacy, prescribe a lens, or predict an individual outcome.
