Son's unwavering devotion: A family's journey with intellectual disability in Singapore

Two adult sons sacrificed educational opportunities and career advancement to serve as primary caregivers for their father with intellectual disability and their mother with a vascular condition.
If you ask me to close my eyes and fall back, I know Dad will catch me.
Karthigeyan reflects on the unreserved trust he has in his father despite their cognitive differences.

In a modest flat in Hougang, Singapore, two brothers have quietly built their lives around a father who cannot read a clock or count change, yet who packs a work bag each evening with the devotion of someone who has found his truest calling. D. Pannerchelvam, 67, lives with mild intellectual disability and epilepsy, conditions that cost him his livelihood and reshaped the futures of his sons, who sacrificed education and career to stand beside him. Their story asks something of all of us: what does it mean to be known by someone who cannot name what you have accomplished, and to love them fully anyway.

  • A father who cannot tell time or make change has nonetheless anchored his family through decades of quiet, unwavering ritual — and his sons have organized their entire lives around protecting that dignity.
  • When a 2011 diagnosis finally named what the family had long sensed, it did not bring relief so much as a reckoning: two incomes disappeared, outbursts needed managing, and a teenager began calculating which classes he could afford to miss.
  • Karthigeyan dropped out of polytechnic, deferred his ambitions through national service, and rebuilt his education piece by piece — earning a diploma in health science management while working full-time and accompanying his parents to medical appointments.
  • The family has stabilized — a daycare routine, a new flat, a brother's business, a son's hospital career — but the emotional ledger remains open: Karthigeyan knows his father will never understand what he has achieved, and has made a kind of peace with that absence.
  • What endures is not recognition but trust — a son who remembers that his father once surrendered his most treasured two-dollar note without hesitation, and who says, even now, that he knows his father will catch him if he falls.

D. Pannerchelvam cannot read a clock or calculate change, but every evening he packs his younger son's work bag with careful purpose — socks, a T-shirt — and in the morning his face brightens when he says goodbye. For his sons Shanger and Karthigeyan, this ritual is not a small thing. It is the shape their father's love takes.

Pannerchelvam's cognitive limitations were never formally named during his children's early years. He had been matched with his wife Pusppa through family arrangement in 1992; she was not told of his condition before the wedding. She married him anyway and has spent years accounting for his virtues — his gentleness, his diligence, his clean habits. He learned to be a father by doing: feeding infants, changing diapers, traveling to school with a note his wife had written because he could not speak to the staff himself.

In 2011, erratic behavior and sudden outbursts led the family to the Institute of Mental Health, where doctors diagnosed mild intellectual disability paired with epilepsy. Both parents lost their jobs around the same time — Pannerchelvam his restaurant cleaning work, Pusppa hers due to a vascular condition. The family survived on government assistance and whatever the boys could earn part-time. Karthigeyan began skipping classes to accompany his parents to appointments, and eventually dropped out of his polytechnic course entirely. He did not return to formal education until after national service, completing a diploma in health science management only through part-time study.

Today Karthigeyan works at KK Women's and Children's Hospital, his brother runs a logistics firm, and their father attends a daycare center where his days follow a steady, comforting rhythm. On Pannerchelvam's 67th birthday, his sons took him for his favorite chicken meal, gave him a frame of vintage two-dollar notes — the denomination he has always treasured — and brought him to the arcade where he once took them after payday.

Karthigeyan is honest about what his father cannot offer him. There will be no moment of paternal recognition, no understanding of the diploma or the career or the cost of getting there. His mother does not know either. "I just feel like my parents will never understand what I've achieved in life," he said, his voice unsteady. Yet he does not speak of his father with grief so much as with a particular, hard-won certainty. As a child, he knew that his father — for whom a two-dollar note held the weight of a hundred — would hand one over without hesitation if asked. "If you ask me to close my eyes and fall back," Karthigeyan said, "I know that Dad will catch me."

D. Pannerchelvam cannot read a clock. He does not understand the denominations of dollar bills. He knows almost nothing about what his two adult sons do for work. Yet every evening, the 67-year-old moves through a ritual with the precision of someone who has found his purpose: he packs his younger son's work bag for the next day. Socks. A T-shirt. In the morning, they say goodbye. His face brightens when he speaks his grandchildren's names.

For nearly three decades, brothers Shanger and Karthigeyan Pannerchelvam have lived in a role that most people never have to consider. They are not simply sons. They are protectors of a father with mild intellectual disability—a condition that affects how he processes information, communicates, and manages the tasks of daily life. Karthigeyan, now 27, has spent much of his adulthood repeating the same phrase to anyone who will listen: "I don't want anyone to look down on Dad." The repetition itself is a kind of testimony.

Their father's condition was not always named. Growing up, Karthigeyan simply noticed that his father seemed to learn differently. He could not tell time. At shops, he would grip his favorite two-dollar bills and struggle to calculate change. Their parents had been matched by family and married in 1992. No one told their mother, Pusppa Nadeson, about her husband's cognitive limitations before the wedding. She married him anyway, and she has spent decades cataloging his virtues: he did not smoke or drink, he worked hard, he kept the house clean, he had a gentle temperament. When their first son was born in 1997, Pannerchelvam did not immediately understand that he was becoming a father. But he learned. He fed the boys. He changed diapers. He came home from his job as a restaurant cleaner and asked his wife if the baby had drunk milk. When Karthigeyan forgot something at school, his father traveled there to deliver it, carrying a note his wife had written because he could not speak to the staff himself.

In 2011, something shifted. Pannerchelvam's behavior became erratic. He came home from work without reason. He lost his temper. The family brought him to the Institute of Mental Health, where doctors gave his condition a clinical name: mild intellectual disability, paired with epilepsy. The diagnosis explained things Karthigeyan had intuited since childhood—why he had always answered questions before his father could, why he had worked to hide what he sensed was different about his family. "Deep down, I knew it was different compared with my friends' parents," he said years later.

Pannerchelvam stopped working. Around the same time, Pusppa developed a vascular condition that swelled her legs and forced her to leave her job as a cleaner. Two incomes vanished. The family fell into what Karthigeyan describes as one of their hardest periods. They survived on government assistance and money the boys earned from part-time work. Someone had to watch Pannerchelvam during his outbursts to make sure he did not hurt himself. Karthigeyan learned to calculate how many classes he could skip at the Institute of Technical Education to accompany his parents to medical appointments. He eventually dropped out of his digital precision engineering course at Nanyang Polytechnic to work full-time. He did not return to school until after national service, and even then only part-time, eventually earning a diploma in health science management.

Today, Karthigeyan works as a patient service associate executive at KK Women's and Children's Hospital. His older brother runs a logistics and event management firm. They have moved from a two-room rental flat in Whampoa to a similar one in Hougang, where Karthigeyan still lives with his parents. Pannerchelvam's condition has stabilized. He attends a daycare and rehabilitation center run by the Home Nursing Foundation, where he does art and craft and plays games. His days follow an unchanging rhythm: wake at five, eat breakfast, watch cartoons or Tamil films, board a chartered bus to the center.

Karthigeyan is dating a woman in Thailand and hopes to marry. His girlfriend has met his family and gets along with them, including his father. On Pannerchelvam's 67th birthday in June, they took him to eat his favorite chicken meal and gave him a frame holding vintage two-dollar notes. Karthigeyan took him to the arcade afterward—a place their father used to bring them to after payday, where he loved to play basketball. For Father's Day, Karthigeyan gave him a new bag for the daycare center.

But Karthigeyan is clear-eyed about what his father cannot give him. Other sons seek recognition from their fathers. He knows he will never have that. His father does not know about his diploma, his job, or the path he took to get there. His mother does not know either. "I just feel like my parents will never understand what I've achieved in life," he said, his voice wavering. Yet he trusts his father completely. As a child, he and his brother would ask for chocolates that cost two dollars. Though the two-dollar note is his father's most treasured currency, he would hand one over without hesitation. "Two dollars is equivalent to one hundred dollars for him," Karthigeyan said. "But somehow, he would give it to us. If you ask me to close my eyes and fall back, I know that Dad will catch me."

I don't want anyone to look down on Dad.
— Karthigeyan Pannerchelvam
I just feel like my parents will never understand what I've achieved in life.
— Karthigeyan Pannerchelvam
A Conversa do Hearth Outra perspectiva sobre a história
Inventor

What made you decide to speak publicly about your father's condition?

Model

I think people see intellectual disability and they make assumptions. They look down. I wanted them to see my dad the way I see him—as someone who loves his family, who shows up, who has worth.

Inventor

You sacrificed a lot—your education, your early career. Do you resent that?

Model

Resent isn't the right word. It was what needed to happen. My parents couldn't work. My brother and I could. That's how families work, isn't it? You do what you can for the people you love.

Inventor

But there's something you said that stuck with me—that your parents will never understand what you've achieved. That sounds lonely.

Model

It is. I've made peace with it, mostly. I can't expect him to understand my diploma or my job the way other fathers might. But he knows I leave in the morning and come home at night. He knows I care for him. Maybe that's enough.

Inventor

Your father gives away his most precious currency without hesitation. What does that tell you about him?

Model

That he loves us more than he loves money. That his mind works in a way that's pure, uncomplicated. He doesn't calculate the cost of love. He just gives it.

Inventor

What do you want people to know about families like yours?

Model

That we're not tragic. Yes, there are hard days. Yes, I had to make choices other people don't have to make. But my father is happy. My family is intact. We show up for each other. That's not a tragedy—that's just life.

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