Corneal biomechanical parameters and intraocular pressure: the effect of topical anesthesia

Figures & data

Figure 1 Average corneal thickness values for session one before, 2 minutes after, and 5 minutes after the instillations of polyvinyl alcohol (0.5%), tetracaine hydrochloride (0.5%), and oxybuprocaine hydrochloride (0.4%).

Note: The P values are the results of repeated-measures ANOVA comparisons for each eye drop.
Abbreviation: ANOVA, analysis of variance.

Figure 2 Average corneal hysteresis values for session one before, 2 minutes after, and 5 minutes after the instillations of polyvinyl alcohol (0.5%), tetracaine hydrochloride (0.5%), and oxybuprocaine hydrochloride (0.4%).

Note: The P values are the results of repeated-measures ANOVA comparisons for each eye drop.
Abbreviation: ANOVA, analysis of variance.

Figure 3 Average corneal resistance factor values for session one before, 2 minutes after, and 5 minutes after the instillations of polyvinyl alcohol (0.5%), tetracaine hydrochloride (0.5%), and oxybuprocaine hydrochloride (0.4%).

Note: The P values are the results of repeated-measures ANOVA comparisons for each eye drop.
Abbreviation: ANOVA, analysis of variance.

Table 1 Demographic Data of the Subjects

	All groups	Polyvinyl alcohol	Tetracaine	Oxybuprocaine
Gender	42 male eyes (36f)	14 male eyes (12f)	15 male eyes (11f)	13 male eyes (13f)
Age (years)	22.4 ± 2.3	22.7 ± 2.2	22.3 ± 2.2	22.1 ± 2.5

Notes: The groups are those for session 1. The ages are reported as mean ± SD Number of female eye are italicized and in brackets.

Figure 4 Average Goldmann-correlated IOP values for session one before, 2 minutes after, and 5 minutes after the instillations of polyvinyl alcohol (0.5%), tetracaine hydrochloride (0.5%), and oxybuprocaine hydrochloride (0.4%).

Note: The P values are the results of repeated-measures ANOVA comparisons for each eye drop.
Abbreviations: ANOVA, analysis of variance; IOP, intraocular pressure.

Figure 5 Average corneal-compensated IOP values for session one before, 2 minutes after, and 5 minutes after the instillations of polyvinyl alcohol (0.5%), tetracaine hydrochloride (0.5%), and oxybuprocaine hydrochloride (0.4%).

Note: The P values are the results of repeated-measures ANOVA comparisons for each eye drop.
Abbreviations: ANOVA, analysis of variance; IOP, intraocular pressure.

Figure 6 Limits of repeatability for the Goldmann-correlated IOP before (solid black lines with arrow heads), 2 minutes post-instillation (dotted gray lines with diamond heads), and 5 minutes post instillation (dotted lines with round heads) of tetracaine hydrochloride (0.5%) in session 1.

Abbreviation: IOP, intraocular pressure.

Figure 7 Limits of repeatability for the Goldmann-correlated IOP before (solid black lines with arrow heads), 2 minutes post instillation (dotted gray lines with diamond heads), and 5 minutes post instillation (dotted lines with round heads) of tetracaine hydrochloride (0.5%) in session 2.

Abbreviation: IOP, intraocular pressure.