Frequently Asked Questions



20/Mar/2025

 

Dr. Chau
Optometrist: Steven Chau, Jr., O.D.
Practice: Vision Republic, Katy, Texas
Patient: 31 YO Female
Condition: Myopia OU with GPC

Presentation:
Patient works in a lab setting where she has wears a face mask and goggles, causing her glasses to fog up. She is also prohibited from wearing soft contact lenses in the lab. She is looking for an alternative to wearing contact lenses at work and has expressed interest in Ortho-K as a solution to meet her visual needs in her career.

Ocular History:
She has tried both monthly and daily contact lenses in the past but experienced issues with GPC. As a result, corneal GP lenses were not a suitable option for her either. 

Prescribed lenses:
Ortho-ATX lens in Boston XO material. Managing her GPC has been a top priority over the past 16 months to maintain comfort and VA.
OD: -3.50 -0.75 x 171
OS: – 3.75 -1.00 x 016

Learn more

Outcome:
Patient wears her Ortho-K lenses for 8 hours each night and remains uncorrected during the day.
BCVA: 20/20 OU

Help More Patients in Your Area:
Find Vision Republic on our Physician Locator page as a specialty contact lens practice. Is your practice on the map? Check here.


12/Mar/2025

Maximum Astigmatism

MetroSoft Max stands for “maximum astigmatism,” ideal for your patients whose visual needs can’t be met with glasses or standard daily contact lenses.

Lens Parameters

The MetroSoft Max can correct up to 8.00D of astigmatism, and we deliver the lenses to you in about a week.

Base curve: 8.1 to 8.9 depending on material
Power: -12.00 to +12.00
Diameter: 14.0, 14.2 depending on lens design
Prism: 1 Diopter

Extended parameters are available.

Ideal Patient

Any astigmatic case with up to 8.00 diopters of corneal cylinder.

Stable Vision

The Metro Soft Max is indicated  for patients with 2.00D or more of corneal astigmatism. The cylinder correction is incorporated into the back surface of the lens, which aligns with the irregular curvature of the cornea.

This results in a “saddle-fit,” which stabilizes the lens on the cornea, improving comfort and VA compared to a spherical contact lens.

Latheable Materials

Our soft contact lens line is available in three materials, listed below. Our consultants will work with you to determine the best material for your patient, with ocular surface health as our top priority.

  1. Polymacon: 38% water standard hydrogel
  2. Hioxyfilcon-B: 49% water standard hydrogel
  3. Definitive SiHy Efrofilcon-A: 74% water, 60 Dk (first latheable Silicone Hydrogel Material)
    Learn More

Replacement schedule

Planned replacement is at the discretion of the doctor. The life of the lens will depend on how well the patient cares for the lenses. Multi-packs are available up to annual supply.

Log-In or Register your free account to the Physician Portal to access multi-pack details.

Education

“You can wear contacts!” We’re here to help you educate your patients about all of their contact lens options.

CONSULTATION: 800-223-1858
EMAIL: info@metro-optics.com


04/Feb/2025

Simple & Straightforward

Fitting corneal GPs is easier than you think. Getting started is easy – no diagnostic fit set is required for most Metro Optics GP lens designs.

Note: Keratoconus can be fit empirically, but chair time is reduced by using a diagnostic set. We offer a complimentary ComfortKone Quick Fit Set. Learn more here.

Order GP lenses empirically, without any lens design calculations. Simply send the following patient information to consultation.

Exam Information

  • Corneal Topography
  • Keratometry Readings (Auto-K works well)
  • Manifest Refraction
  • Pertinent Patient History (surgery, trauma, past contact lens wear)

This information helps us understand the corneal shape & curvatures we are attempting to fit. If you don’t have a topographer, that’s okay!

GP Lens Designs

All major brand materials are available including Hyper Dk materials.

  1. Standard Spherical GP
    Less than 3.00D Astigmatism
  2. Specialty GP Designs
    Toric lens options: base, front surface, bi-toric designs
  3. Metro Progressive Multifocal GP
    Presbyopic patients
    Up to 3.00D ADD

sphere (left) versus toric (right)
Spherical Lens on Left & Toric Lens on the Right

4. MetroSeg Translating Bifocal GP
Segmented Bifocal
Up to 3.00D ADD
5. RSa or RSb Post – Surgical GP
Post-surgical lens
Vaults central corneal irregularity

RS stands for Refractive Surgery
RSa: Spherical configuration
RSb: Reverse geometry configuration

Hydra-PEG

You have the option to Hydra PEG the lens which is a 90% water PEG (polyethylene glycol) coating that is covalently bonded to the surface of the lens. Hydra PEG improves wettability, comfort and clarity.
Learn more

Do What You Can

If you don’t have all the information listed above, don’t worry! Our experienced consultants can design a lens based on the details you provide. The more accurate information we receive, the faster we can get the final lens to you.

We are here to support you every step of the way!

Sincerely,
Your Metro-Optics Team

CONSULTATION: 800-223-1858
EMAIL: info@metro-optics.com


15/Jan/2025

What Information Do You need to order an InSight Scleral Lens?

Our methodology focuses on simplicity and optimizing your chair time. Provide us with your observations, and we’ll handle the lens parameters.

If you can place a diagnostic lens on the eye with sodium fluorescein (NaFl), note your observations, we can deliver an initial lens within a few days.

Corneal and scleral GP lenses typically take 2–3 days to manufacture; Hydra-PEG adds one day to the process. Standard shipping is 2-3 business days.

Checklist for Simplified Ordering:

1. Initial Lens Selection
Based Selection on Sagittal Height
This reflects the overall curvature of the cornea.

  • Steep/Ectatic Corneas: Start with the Prolate 5.000 SAG
  • Flatter/Oblate Corneas: Select the Oblate 4.750 SAG

2. Evaluation (Three Steps)

  1. Central Clearance:
    Aim for ~250 microns of clearance, represented by a 1:1 ratio—250 microns of post-lens tear film and 250 microns of lens center thickness.
  2. Peripheral Clearance:
    Ensure NaFl clears the limbus 360° with 50–80 microns of peripheral clearance. Look for any areas of bearing or blanching; the limbus should always be vaulted.
  3. Edge Alignment:
    The lens should sit comfortably on the conjunctiva. Check for signs of impingement or blood vessel constriction.

    Please send images or short 2-3 second videos of the lens on the eye.

    Quick Tip:
    After lens removal, check for staining and report it to consultation if present.

3. Patient Feedback

Ask the patient how the lens feels:

  • Lens Awareness: If the patient feels the lens, it’s likely a landing issue.
  • Discomfort: If the lens is uncomfortable, remove it immediately. Scleral lenses should be very comfortable.

4. Topography:

Provide topographical data for consultation—it gives a clearer picture for customized lens fitting.

5. Anterior Segment OCT (Optional):

If available, AS-OCT images offer additional data to help understand what is happening with the lens on the eye, though it is not required.

6. HVID (Horizontal Visible Iris Diameter):

This measurement is essential for incorporating multi-focal optics, optimizing visual acuity and customizing the lens to the patient’s lifestyle.

7. Sphere-Cylinder Over-Refraction:

The SCOR provides the most accurate visual acuity and avoids inducing astigmatism. The InSight Scleral Lens can incorporate up to +3.00 D of ADD power.

8. Pertinent Patient Information:

Provide details such as:

  • Previous contact lens wear
  • Surgical procedures
  • Visual demands
  • Any factors that could significantly impact the lens design

9. Hydra-PEG (Optional):

Ask during consultation if Hydra-PEG is suitable for the patient.
Hydra-PEG Benefits:

  • Improves wettability by lowering the wetting angle
  • Reduces deposits and fogging

Please call consultation with the above information to discuss further, and we will have the lenses to you in a few short days.

If you don’t have all the information listed above, don’t worry! Our experienced consultants can design a lens based on the details you provide. The more accurate information we receive, the faster we can get the final lens to you.

We are here to support you every step of the way!

Sincerely,
Your Metro-Optics Team

CONSULTATION: 800-223-1858
EMAIL: info@metro-optics.com

 


01/Nov/2024

Dr. Arun Kaistha

Doctor: Dr. Arun Kaistha
Practice: Cooper River Eye Eye Associates, New Jersey
Patient: 15-year-old male
Condition: Undiagnosed Keratoconus

Background:
A 15-year-old male patient had been struggling with deteriorating vision for several years, visiting multiple doctors. Despite numerous consultations, the root cause of his vision issues remained unidentified, leaving the patient barely able to count fingers.

Treatment:
Upon visiting Dr. Kaistha, the patient was properly diagnosed with Keratoconus. The patient was fit in the InSight Scleral Lens.

Learn more here

Outcome:
VA of 20/20 with comfortable all day lens wear. The successful diagnosis and treatment significantly improved his vision and quality of life.

Help More Patients in Your Area:
Find Dr. Kaistha on our Physician Locator page as a specialty contact lens doctor. Is your practice on the map? Check here.


01/Jul/2024

Today our focus is on Dr. Tammi Graham, OD of Graham Eye Associates in the Woodlands, Texas. We asked Dr. Graham ten questions to learn more about her, and her practice. Her answers offer clarity and insight into the life-changing world of custom contact lenses.

Graham Eye Associates front desk

1. What inspired you to specialize in custom contact lenses, and what unique approach do you bring to your practice?

My inspiration to specialize in custom contact lenses stemmed from the clinical care of my patients suffering from ocular surface and corneal diseases. My clinical training included management of these conditions through the use of traditional medical therapeutics, as well as the use of custom contact lenses to recover functional vision. This unique multi-dimensional clinical approach has consistently been shown to be one of the most effective and efficient treatment protocols for my patients. 

2. Can you walk me through your process for fitting custom contact lenses for patients with specific eye conditions or needs?

The most important process in the fitting of custom contact lenses is the initial comprehensive examination of the visual system and the factors that affect its function. This includes a thorough reporting of the patient’s medical history, the physical and visual examination of the eyes, as well as establishing an understanding of the patient’s daily visual needs. Analyzing all the information gathered will allow a more accurate and successful selection of custom contact lenses for our patient.

Graham eye associates scleral lens insertion

3. How do you stay updated with advancements and technologies in the field of custom contact lenses to ensure your patients receive the best care possible?

Attending continuing education courses and participating in specialty contact lens workshops keep me updated on the advancements and technologies in the field.

4. Could you share a particularly challenging case you’ve encountered in your practice and how you approached it?

One of the most challenging clinical cases I’ve had involved a patient that had complications associated with a corneal graft. The patient’s cornea had many scars from these complications which resulted in many irregularities on the entire ocular surface. These irregularities are challenging in the custom lens fitting process because their anatomic and physiologic behaviors can be difficult to manage. I approached this case by using a combination of topical medications and persistent customization of the contact lenses until we arrived at the maximum fit and comfort level for the patient.

5. What measures do you take to ensure patient satisfaction and comfort with their custom contact lenses?

I utilize direct and indirect surveys to get updates on the patient’s experiences with the fitting process, visual improvement, and overall comfort with their custom contact lenses. Direct surveys are conducted as part of the patient’s in-person follow up exams, and indirect surveys are conducted via HIPAA compliant messaging.

Dr. Tammi Graham slit lamp

6. How do you collaborate with other eye care professionals or specialists to provide comprehensive care for your patients?

Doctor to doctor communication is very important to me because this is when our patients receive the most comprehensive care. I make it a priority to send reports to doctors with whom we share in the care of our patients.

7. In what ways do you customize your approach for patients with unique lifestyle or occupational demands?

Individualizing the clinical approach for each patient starts with spending time to get to know how the patient spends their day. This may include understanding the nature of their work, their hobbies, and how they like to spend their free time. This individualized approach makes it fun and motivating for patients throughout the fitting process.

8. Can you discuss any innovative techniques or technologies you utilize in your practice for fitting custom contact lenses?

I utilize specialized slit lamp techniques to view the custom lenses’ fitting behavior when worn on the patient’s eyes. In addition, I rely on corneal topographies to create maps of the cornea to assess the cornea’s response to the custom lens. I also utilize the optical coherence tomography to assess the eye anatomy and physiology as it adapts to the custom lenses.

Graham eye associates

9. What advice do you often give to patients to help them maintain optimal eye health while wearing custom contact lenses?

We emphasize proper care and hygiene to maintain good eye health and safety during lens use. In general, we recommend patients wear their lenses during the day except in special cases when overnight wear might be indicated. There are additional recommendations and wear tips that we provide during the training and dispense visit.

10. How do you handle patient education and support regarding the use and care of their custom contact lenses, especially for first-time users?

We offer multiple training sessions as part of the initial dispense for new wearers. We keep close follow up on our patients’ progress to make sure that they are adjusting well to their new custom lenses. We also pre-schedule follow up exams to assess the patient’s vision and eye health as they get more accustomed to using their new lenses.

Schedule an appointment with Dr. Graham.

Find Dr. Graham on our Physician Locator


01/Nov/2023

Optometrist: Dr. Brian Cox
Practice: Spring Eye Care, Spring, Texas
Patient: 51 YO Male Elevator shaft technician
Condition: Advanced Keratoconus

Background:
Rx:
OD -35.25
OS -32.25

Steep Ks
OD 66.5 D
OS 66.5 D

  • This was the last reading taken in 2021
  • Unable to get a current reading
  • Corneal scarring
  • Vision: patient is unable to see
  • With lenses he’s still off the chart

Treatment:
Doc fit patient in the ComfortKone RGP Lens FDA Cleared for Keratoconus with piggy back DT +1.00

Outcome:
Corrected vision 20/40 OU

Help More Patients in Your Area:
Dr. Cox on our Physician Locator Page as a specialty contact lens physician. Is your practice on the map? Check here.


16/Oct/2023

Keratoconus corneal topography both eyes

Optometrist: Erin Koetter
Practice: Eye Hub, Houston, TX
Patient: 31 YO Female Engineer
Condition: Undiagnosed Keratoconus

Background:
She had no clue that she had undiagnosed Keratoconus. She was functional at 20/400 OD and OS. She was told she had “lazy eyes.”

Treatment:
Once the patient was properly diagnosed with Keratoconus, Dr. Koetter successfully fit her in the ComfortKone RGP Lens and referred her for corneal cross-linking (CXL).
Learn more here

Outcome:
After fitting her successfully in the ComfortKone Lens, her vision is now 20/20 OU. She was floored. She had no idea what the world could even look like.

Help More Patients in Your Area:
Find Dr. Koetter on our Physician Locator page as a specialty contact lens doctor. Is your practice on the map? Check here.


01/Jun/2020

Health, Happiness & Multifocal Lenses

Metro Optics custom multifocal lenses fill a niche commodity lenses can’t touch.

By using Metro Optics proven presbyopic lens designs, you will realize how simple and rewarding it is to fit custom multifocal contact lenses. 

Metro Optics Multifocal Quick Reference:

Our design portfolio includes soft, corneal GP and scleral lens designs proven to enhance the vision of thousands of presbyopic patients:

MetroFocal  – Center distance soft multifocal, normal cornea profile, up to 2.50D add power, available in toric parameters for patients with 0.75 to 8.00D cornea astigmatism – best suited for the mild to moderate presbyope who desires a soft lens. Empirically order lenses using manifest and keratometry readings. Available in Definitive 74% SiHy, 60 Dk which provides three times the oxygen to the cornea in comparison to other hydrogels (1).

Metro Progressive  – Center distance corneal GP aspheric multifocal, normal cornea profile, up to 2.50D add power, rotation-free optics for patients with less than 2.75D astigmatism, available in back-toric and bi-toric for patients with over 3.00D corneal astigmatism – best suited for the mild-to-moderate presbyope who is a current GP wearer or desires the crispest vision possible in a multifocal design. Empirically order lenses using manifest and keratometry readings.

Metro SEG  – Translating crescent bifocal with an aspheric intermediate zone, normal cornea profile, unlimited add power, available in back toric and bi-toric for patients with over 3.00D cornea astigmatism – best suited for the moderate to advanced presbyope who is a current GP wearer or desires the crispest distance and near vision possible. Empirically order lenses using manifest and keratometry readings.

InSight Scleral – Center distance multifocal scleral, normal to highly irregular cornea profiles, up to 3.00D add power, thin design maximizes Dk/t of the chosen lens material – best suited for the mild to moderate presbyope who needs a medically necessary lens for keratoconus, post-surgical ectasia or severe ocular surface disease. Diagnostic fitting is required with live virtual training available with a Metro Optics consultant.

An Infinitely Better Material for Corneal GP and Scleral Lenses

When it comes to quality, Metro Optics ensures all lenses are manufactured with the best materials available in the market. To provide your patients with the healthiest contact lens environment, it is recommended to choose a high dK/t lens material such as Optimum Infinite, which has a hyper oxygen permeability value of 180Dk and a high flexural modulus of 1341MPa, defying the high Dk/low flexural modulus convention (2). This material also has excellent surface wettability, which can be further enhanced through the addition of Tangible hydra-PEG coating to make Infinite the healthiest choice for your corneal GP and Scleral lens wearers. 

Metro Cares About Your Practice

Other than manufacturing high quality custom lenses, Metro Optics also provides many benefits to ensure our customers have a profitable custom lens practice. We have always offered 90-day warranties on all lens designs, easy return policies, competitive pricing and expertise consultation to finalize fittings quickly. We will also continue to support our customers by extending warranties on fittings performed prior and during the rebuilding phase of the COVID-19 pandemic. Visit our website at metro-optics.com to learn more about our entire line of custom contact lenses.

PUBLISHED IN THE JUNE 2020 CONTACT LENS SPECTRUM ISSUE

References 

  1. https://www.clspectrum.com/issues/2010/november-2010/contact-lens-design-materials)
  2. https://www.contamac.com/product/optimum-infinite





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