Irregular corneas
and superficial
opacities

Restoring a smooth, clear surface, when the condition stays superficial.

This page brings together several situations that share one feature: a corneal surface that has become irregular or opaque, but where the condition stays superficial. It notably includes Salzmann’s nodular degeneration (raised areas that form on the surface), band keratopathy (a horizontal band of calcium deposit) and the superficial opacities or scars left by a past infection, injury or inflammation.

What you may feel

Symptoms depend on the condition, but largely overlap.

Mechanical discomfort

A foreign-body sensation, irritation, watering, when the surface is raised or has deposits — this is common in Salzmann’s degeneration and band keratopathy.

Reduced or distorted vision

When the irregularity or opacity encroaches on the visual axis, vision becomes blurred and distorted, with glare and halos, sometimes an irregular astigmatism that is difficult to correct with glasses.

A visible appearance

In some cases — a whitish area or a band across the cornea — which may be your first and foremost concern.

What PTK can offer

Here PTK works in two complementary ways. It smooths an irregular surface: with the help of a masking gel, the laser evens out the raised areas, which improves optical regularity, reduces glare and can clarify vision. It clears a superficial opacity: by removing the cloudy layer, it restores transparency in the visual axis.

Depending on the condition, it is combined with other steps: removal of the nodules for Salzmann’s degeneration, or chelation (dissolving the calcium) for band keratopathy, with PTK then regularising the residual bed. The aim is to regain comfort, a smoother surface and, where the visual axis was involved, clearer vision.

What you should know about its limits

These limits matter particularly here:

PTK treats the surface only. A deep opacity or scar is not a matter for it, but for other solutions, up to a lamellar graft.

An irregular astigmatism linked to a deeper deformation may partly persist.

These conditions can return, especially if their underlying cause (chronic inflammation, a calcium abnormality) persists; treating the cause is part of the management.

The shift towards hyperopia needs slightly closer attention with these surface treatments, and is built into the strategy.

And, as always: if the condition affects neither vision nor comfort, monitoring it without intervening is a legitimate option.

How I proceed

Mapping the cornea is decisive: it distinguishes what is superficial — and therefore within reach of PTK — from what is not, and estimates the realistic visual gain. Together we decide on the most suitable step, the possible role of PTK, and how to anticipate the shift in correction. Follow-up accompanies healing and watches for any recurrence.

Irregular corneas and superficial opacities