The effect of hydrogel and silicone hydrogel contact lenses on the measurement of intraocular pressure with rebound tonometry

Abstract

Rebound tonometry can be reliably performed over silicone hydrogel CLs. With hydrogel CLs, the measurements were lower than those without CLs. However, despite the fact that these differences were statistically significant, their clinical significance was minimal.

Dynamic contour tonometry over silicone hydrogel contact lens

“…Similar findings could be observed in rebound tonometry, that is less effect from silicone hydrogel than hydrogel materials on IOP measurements. 28 This may be in concordance with the speculation that silicone hydrogel contact lens can provide a more stable contact surface than hydrogel contact lens. 10 Although a significant IOP difference was found in the current study over one lens wearing sequence, this was not substantiated in the reverse wearing sequence.…”

Intraocular pressure measurement with ocular response analyzer over soft contact lens

“…This may be due to the facts that, Nelfilcon A lenses have greater center thickness and higher modulus. Zeri et al also found higher difference in hydrogel lenses than that of silicone lenses [16].…”

“…However, some of the studies showed no significant difference in the IOP measurement with and without CL [10,13,16]. Gogniat et al investigated the reliability of IOP measured by dynamic contour tonometry with and without contact lens [10].…”

“…Some of them found significant differences in the two measurements [12,14,15,17,20], while others did not find any differences [10,13,16,18,19]. However, in our knowledge, no studies have been conducted comparing IOP with and without CL using ORA.…”

“…Many studies have been done to evaluate the IOP with and without CL using different methods of tonometry as summarized in Table 1 [10][11][12][13][14][15][16][17][18][19][20][21]. Some of them found significant differences in the two measurements [12,14,15,17,20], while others did not find any differences [10,13,16,18,19].…”