Study: NCT01333891

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Phenylephrine
Description: Neosynephrine®, Winthrop Breon Laboratories New York, NY, USA 0, 0.5, 1 and 2 μg/kg/min, each infusion step for 5 minutes, total infusion period of 20 minutes

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Phenylephrine
Description: Neosynephrine®, Winthrop Breon Laboratories New York, NY, USA 0, 0.5, 1 and 2 μg/kg/min, each infusion step for 5 minutes, total infusion period of 20 minutes

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Phenylephrine
Description: Neosynephrine®, Winthrop Breon Laboratories New York, NY, USA 0, 0.5, 1 and 2 μg/kg/min, each infusion step for 5 minutes, total infusion period of 20 minutes

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Sodium-Nitroprusside
Description: Nipruss®, Sanol-Schwarz, Monheim, Germany 0, 0.5, 1 and 2 µg/kg/min, each infusion step for 5 minutes, total infusion period of 20 minutes

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Sodium-Nitroprusside
Description: Nipruss®, Sanol-Schwarz, Monheim, Germany 0, 0.5, 1 and 2 µg/kg/min, each infusion step for 5 minutes, total infusion period of 20 minutes

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Sodium-Nitroprusside
Description: Nipruss®, Sanol-Schwarz, Monheim, Germany 0, 0.5, 1 and 2 µg/kg/min, each infusion step for 5 minutes, total infusion period of 20 minutes

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: Suction Cup
Description: experimental stepwise increase of intraocular pressure while measurement of choroidal thickness suction force of 25, 50, 75, and 100 mmH

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: Suction Cup
Description: experimental stepwise increase of intraocular pressure while measurement of choroidal thickness suction force of 25, 50, 75, and 100 mmH

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: Suction Cup
Description: experimental stepwise increase of intraocular pressure while measurement of choroidal thickness suction force of 25, 50, 75, and 100 mmH

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: Goldmann applanation tonometer
Description: intraocular pressure measurements

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: Goldmann applanation tonometer
Description: intraocular pressure measurements

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: Goldmann applanation tonometer
Description: intraocular pressure measurements

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: 1060nm Optical coherence tomography
Description: Optical coherence tomography is a widely used non-invasive method to image the retina and choroid. Using a 1060nm light source coupled to a commercially available OCT system (Heidelberg Engineering, Heidelberg, Germany) allows for the measurement of choroidal thickness

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: 1060nm Optical coherence tomography
Description: Optical coherence tomography is a widely used non-invasive method to image the retina and choroid. Using a 1060nm light source coupled to a commercially available OCT system (Heidelberg Engineering, Heidelberg, Germany) allows for the measurement of choroidal thickness

Intervention type: DEVICE
Group type: ACTIVE_COMPARATOR
Intervention: 1060nm Optical coherence tomography
Description: Optical coherence tomography is a widely used non-invasive method to image the retina and choroid. Using a 1060nm light source coupled to a commercially available OCT system (Heidelberg Engineering, Heidelberg, Germany) allows for the measurement of choroidal thickness