Swan plant’s toxic sap blinds man

Bob Warman went blind in both eyes temporarily because of swan plant sap. One eye is still in recovery mode nine months later. PICTURE: Northern Advocate

Bob Warman is not afraid of hard work in the garden.
Nearly nine months ago he was pruning swan plants on a hot day.
It was when he wiped the sweat
out of his eyes with the back of his arm that the white sticky sap of the swan plants was smeared across his eyes.
“I knocked the tops off the swan plants…. they were getting a bit high. I do recall seeing all the white stuff on my arm but didn’t take any notice of it.”
Three hours later he could feel a stinging sensation in his left eye.
He rinsed his eye with water
and used some eye drops, but did not think too much about it. Then at 4.40am Mr Warman woke to find
he could not see. He likened it to
trying to look through a foggy shower door.
“I had a moment of panic. I made a cuppa and sat down.”
He said he could not see his phone to call for a taxi and he was unable to rouse his next-door neighbour to help him. So he walked from his Morningside home to White
Cross on Bank Street in central Whangarei.
“I had a bit of peripheral vision so I had a bit of an idea of where I was going”. But it was the voices of children going to school he used as his main guide.
“I found out what it’s like to use the buzzers at the intersections.”
Months later he has regained sight in his right eye but scarring has left vision in his left eye far from the perfect vision he previously had. An opthomologist a doctor who specialises in eye and vision care who saw Mr Warman was not surprised the swan plant sap had caused the damage as it is very
Mr Warman wanted to share his
horrific experience so those with the plants were aware of the potential risks.
“Everyone I tell about what’s happened (people) aren’t aware of how toxic it is. I just want parents to know so they can just watch their children as they are very popular when it comes to monarch butterflies and learning about the life cycle.”
The swan plant is a food source for the caterpillar of the monarch butterfly. The life cycle of the monarch butterfly is the main reason the swan plant is present in preschool centres as children can trace the changes from egg to caterpillar to chrysalis to butterfly.
The New Zealand National Poisons Centre website says swan plants are toxic, and swallowing even a small amount could be a problem. Ingestion of the plant material can affect the heart, breathing, central nervous system and the stomach.
The site says because of the educational benefits of teaching children about the life cycle of the monarch butterfly, swan plants are not on the Landcare Research list of
plants that should not be grown or tolerated in New Zealand preschool centres.
“Although it is a toxic plant, swan plants can be grown in childcare centres or homes with small children, providing supervisors are aware of the toxic nature of the plant, and take all necessary precautions to prevent poisoning from occurring.”
The site recommends if the sap is swallowed people immediately seek medical advice from a doctor.
It is not necessary to give any fluids, and do not make the person vomit.
If on skin flush the exposed area
with lots of water and seek medical advice.
If in the eyes flush the eye with room-temperature water for at least
15 minutes and seek medical advice.
Northern Advocate

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