regarding retinal vessel , the following are correct except.. Vasoconstriction may develop in case of hypertension

regarding retinal vessel , the following are correct except:
• Oxygen produces vasoconstriction.
• Hypoxia produce vasodilatation.
• Increase con2 produce vasodilatation.
• Autonomic innervations  produces constriction and dilatation.
• Vasoconstriction may develop in case of hypertension.***