Schiotz-Applanation Disparity Following Retinal Detachment Surgery

Tonometry

“…Each unit of the scale indicates 1/20 mm of the cornea and evaluate the extent of the corneal deformation caused by a weighted force applied from the outside [4].The Schiötz tonometer does not require the use of the slit lamp, it is simple to use, but the IOP value obtained can be biased since repeated measurements may reduce the IOP value while the supine position is known to increase IOP [5]. The values of IOP obtained with this tool depend on several factors: the elastic properties of the eye, aqueous humor formation and removal, scleral rigidity [6],, high myopia and ocular blood volume changes. Others factors may cause an erroneous result: calibration problems, patient position, squeezing of the eyelids during the measurement, just to name a few although these errors affect the outcome of other tonometers also to some extent.…”

Tonometry

“…Each unit of the scale indicates 1/20 mm of the cornea and evaluate the extent of the corneal deformation caused by a weighted force applied from the outside [4].The Schiötz tonometer does not require the use of the slit lamp, it is simple to use, but the IOP value obtained can be biased since repeated measurements may reduce the IOP value while the supine position is known to increase IOP [5]. The values of IOP obtained with this tool depend on several factors: the elastic properties of the eye, aqueous humor formation and removal, scleral rigidity [6],, high myopia and ocular blood volume changes. Others factors may cause an erroneous result: calibration problems, patient position, squeezing of the eyelids during the measurement, just to name a few although these errors affect the outcome of other tonometers also to some extent.…”

Effect of Intraocular Gas on Intraocular Pressure

“…This needle was connected via polyethylene tubing to one side of a differential pres¬ sure transducer. The system was filled with a tissue culture solution (TC 199 Time, minutes 8 This differential equation was inte¬ grated using a modified Runge-Kutta method. A variety of initial conditions were used to simulate normal and patho¬ logic states of the eye, small and large volumes of intraocular gas, and a variety of environmental atmospheric pressure changes, such as those encountered with airplane travel, elevator ascent, or automo¬ bile travel.…”

Tonometry

“…Each unit of the scale indicates 1/20 mm of the cornea and evaluate the extent of the corneal deformation caused by a weighted force applied from the outside [4].The Schiötz tonometer does not require the use of the slit lamp, it is simple to use, but the IOP value obtained can be biased since repeated measurements may reduce the IOP value while the supine position is known to increase IOP [5]. The values of IOP obtained with this tool depend on several factors: the elastic properties of the eye, aqueous humor formation and removal, scleral rigidity [6],, high myopia and ocular blood volume changes. Others factors may cause an erroneous result: calibration problems, patient position, squeezing of the eyelids during the measurement, just to name a few although these errors affect the outcome of other tonometers also to some extent.…”

Effect of Intraocular Gas on Intraocular Pressure

“…This needle was connected via polyethylene tubing to one side of a differential pres¬ sure transducer. The system was filled with a tissue culture solution (TC 199 Time, minutes 8 This differential equation was inte¬ grated using a modified Runge-Kutta method. A variety of initial conditions were used to simulate normal and patho¬ logic states of the eye, small and large volumes of intraocular gas, and a variety of environmental atmospheric pressure changes, such as those encountered with airplane travel, elevator ascent, or automo¬ bile travel.…”

Tonometry

“…Each unit of the scale indicates 1/20 mm of the cornea and evaluate the extent of the corneal deformation caused by a weighted force applied from the outside [4].The Schiötz tonometer does not require the use of the slit lamp, it is simple to use, but the IOP value obtained can be biased since repeated measurements may reduce the IOP value while the supine position is known to increase IOP [5]. The values of IOP obtained with this tool depend on several factors: the elastic properties of the eye, aqueous humor formation and removal, scleral rigidity [6],, high myopia and ocular blood volume changes. Others factors may cause an erroneous result: calibration problems, patient position, squeezing of the eyelids during the measurement, just to name a few although these errors affect the outcome of other tonometers also to some extent.…”

Effect of Intraocular Gas on Intraocular Pressure

“…This needle was connected via polyethylene tubing to one side of a differential pres¬ sure transducer. The system was filled with a tissue culture solution (TC 199 Time, minutes 8 This differential equation was inte¬ grated using a modified Runge-Kutta method. A variety of initial conditions were used to simulate normal and patho¬ logic states of the eye, small and large volumes of intraocular gas, and a variety of environmental atmospheric pressure changes, such as those encountered with airplane travel, elevator ascent, or automo¬ bile travel.…”