Posterior cornea and thickness changes after scleral lens wear in keratoconus patients

Abstract

Short-term scleral lens wear showed a thinning of the cornea and changes in the posterior corneal curvature affects different regions in keratoconus patients with and without ICRS.

The corneoscleral shape in keratoconus patients with and without specialty lens wear

“…Scleral lens wear has been demonstrated to modify the shape of the anterior and posterior corneal surface, but these studies were limited to the central 8 mm corneal diameter [9][10][11]. In this study, mini-scleral lens wear did not result in significant changes to the mean sagittal height of the peripheral cornea and sclera compared to lens-naïve patients, but regional changes were evident.…”

“…Corneal topographic features have been shown to be poor predictors of scleral lens parameters [8]. Conversely, reports on the impact of specialty contact lenses on the anterior ocular shape in keratoconus are mostly limited to the (para) central cornea [9][10][11]. The aim of this work is to determine if the scleral shape in non-lens wearing keratoconus eyes differs from that of healthy controls and how corneal and scleral contact lens wear influence the corneoscleral junction and scleroconjunctival landing area in keratoconus eyes.…”

Optical Impact of Corneal Clearance in Healthy Eyes Fitted with Scleral Contact Lenses: A Pilot Study

“…It should be also noted that the lens with larger sagittal height was fitted the last and possibly there was also some previous accumulated effect of corneal molding with the previous two lenses. Although the wearing period of the three lenses fitted was short, several authors have previously reported topographic changes associated with the initial period of ScCL wear [ 21 , 22 , 23 ]. It has been previously shown that ScCL wear induces corneal changes, including a flattening of the anterior corneal surface [ 12 , 22 ] and a decrease in corneal thickness [ 23 ].…”

“…Although the wearing period of the three lenses fitted was short, several authors have previously reported topographic changes associated with the initial period of ScCL wear [ 21 , 22 , 23 ]. It has been previously shown that ScCL wear induces corneal changes, including a flattening of the anterior corneal surface [ 12 , 22 ] and a decrease in corneal thickness [ 23 ]. Likewise, in patients with keratoconus, ScCLs have shown to induce changes in different regions of the posterior corneal curvature [ 23 ].…”

“…It has been previously shown that ScCL wear induces corneal changes, including a flattening of the anterior corneal surface [ 12 , 22 ] and a decrease in corneal thickness [ 23 ]. Likewise, in patients with keratoconus, ScCLs have shown to induce changes in different regions of the posterior corneal curvature [ 23 ].…”