Scleral Lenses vs. Soft Lenses for Astigmatism and Keratoconus: A Richmond Patient's Guide

Contact lenses can provide clear, convenient vision for many people with astigmatism. However, when astigmatism is more severe or the cornea has an irregular shape due to keratoconus, traditional soft contact lenses may not provide the clarity or stability you need.
 

At Texas State Optical Richmond, we offer specialty contact lens fittings for patients with more complex vision needs. For Richmond patients with keratoconus, irregular corneas, or significant astigmatism, scleral lenses may provide clearer and more consistent vision than conventional soft contacts.
 

How Do Soft Contacts Correct Astigmatism?

Standard soft contact lenses conform closely to the surface of the cornea. For patients with regular astigmatism, toric soft contacts are designed with different focusing powers across the lens to correct the uneven curvature causing blurry vision.
 

Toric lenses work well for many patients, especially when astigmatism is mild to moderate and the cornea maintains a relatively regular shape.
 

The challenge comes when the corneal surface becomes more irregular. Because a soft lens follows the shape underneath it, it may not fully compensate for the complex distortion caused by keratoconus or corneal scarring.
 

Why Is Keratoconus Different?

Keratoconus causes the cornea to thin and gradually develop a cone-like shape. Instead of light focusing evenly on the retina, the irregular corneal surface can create blurred or distorted vision that may become difficult to correct with glasses or soft contacts alone.
 

Signs that conventional correction may no longer be providing enough clarity include:
 

• Frequent prescription changes

• Blurry or distorted vision despite updated glasses

• Significant glare or halos around lights

• Difficulty seeing clearly at night

• Soft contacts that move or provide inconsistent vision

• Increasing astigmatism

• Difficulty achieving sharp vision with conventional lenses
   

Keratoconus can vary considerably between patients, which is why an individualized eye examination and specialty contact lens evaluation are important.
 

How Do Scleral Lenses Work?

Scleral lenses are larger rigid gas permeable lenses that vault over the cornea rather than sitting directly on it. The lens rests on the sclera, which is the white portion of the eye.
 

Before insertion, the space between the scleral lens and cornea is filled with preservative-free saline. This creates a smooth optical surface over the irregular cornea.
 

Instead of allowing the lens to follow every irregular contour, the fluid-filled space helps neutralize corneal irregularities. For many Richmond patients with keratoconus or severe astigmatism, this can provide sharper and more stable vision.
 

Are Scleral Lenses Comfortable?

Although scleral lenses are larger than soft contacts, many patients find them surprisingly comfortable. Because they vault over the sensitive corneal surface and rest on the sclera, there is less direct interaction with irregular areas of the cornea.
 

The saline reservoir beneath the lens also keeps the corneal surface continuously bathed in fluid while the lens is worn. This can be particularly beneficial for patients who have dry eye along with irregular corneas.
 

Soft Contacts or Scleral Lenses - Which Should You Choose?

There is no single contact lens that is right for every patient. If you have regular astigmatism and achieve clear, comfortable vision with toric soft lenses, there may be no reason to change.
 

Scleral lenses become especially valuable when the corneal shape is too irregular for conventional lenses to provide satisfactory vision or stability. They may also be considered when traditional contacts are uncomfortable or continually shift on the eye.
 

A specialty fitting involves detailed measurements of your cornea and ocular surface, followed by careful evaluation of lens fit, vision, and comfort. Follow-up appointments allow us to fine-tune the lenses for your individual eyes.
 

If keratoconus, severe astigmatism, or another irregular corneal condition is making glasses or soft contacts frustrating, schedule a specialty contact lens evaluation with Texas State Optical Richmond at 10177 Grand Pkwy Ste 101, Richmond, TX 77407 by calling (346) 210-5200. We can evaluate your corneal shape and determine whether customized scleral lenses may provide clearer, more stable, and more comfortable vision.