Prosthetic technicians measure the leg of Anwar Musaad, 15, who has lost his other leg in a landmine explosion, to prepare an artificial leg for him at the prosthetics center in Sanaa, Yemen July 26, 2022. REUTERS/Khaled Abdullah 

Prosthetic technicians measure the leg of Anwar Musaad, 15, who has lost his other leg in a landmine explosion, to prepare an artificial leg for him at the prosthetics center in Sanaa, Yemen July 26, 2022. REUTERS/Khaled Abdullah 

A man with an amputated leg practices walking with an artificial leg at a prosthetics center in Sanaa, Yemen July 25, 2022. REUTERS/Khaled Abdullah 

Gideon Oladele, a Nigerian artificial limb technician, assists Basit Quazeem as he practises walking for the first time using a prosthesis at the Irede Foundation in Lagos, Nigeria July 14, 2022. REUTERS/Seun Sanni 

Gideon Oladele, a Nigerian artificial limb technician, fixes and couples a leg prosthesis in a laboratory at the Irede Foundation in Lagos, Nigeria July 14, 2022. REUTERS/Seun Sanni 

Gideon Oladele, a Nigerian artificial limb technician, fixes and couples a prosthesis in a laboratory at the Irede Foundation in Lagos, Nigeria July 14, 2022. REUTERS/Seun Sanni 

A former a soldier from the old Afghan Army Khair Mohammad who lost both legs in a mine blast sunbathes at a rehabilitation center in Kabul, Afghanistan October 15, 2021. Taliban fighters are now getting used to new artificial limbs alongside soldiers of the army they fought to defeat. Picture taken October 15, 2021. REUTERS/Jorge Silva 

Taliban fighter Abdul Qayum from Helmand province walks next to a former soldier from the old Afghan Army Khair Mohammad, who lost both legs in a mine blast, during a session to get used to their new leg prosthesis at a rehabilitation center in Kabul, Afghanistan October 14, 2021. Taliban fighters are now getting used to new artificial limbs alongside soldiers of the army they fought to defeat. Picture taken October 14, 2021. REUTERS/Jorge Silva 

Taliban fighter Abdul Qayum from Helmand province walks next to a former soldier from the old Afghan Army Khair Mohammad, who lost both legs in a mine blast, during a session to get used to their new leg prosthesis at a rehabilitation center in Kabul, Afghanistan October 14, 2021. Taliban fighters are now getting used to new artificial limbs alongside soldiers of the army they fought to defeat. Picture taken October 14, 2021. REUTERS/Jorge Silva 

A Taliban fighter Besmillahe Rahmane, who's leg is paralized after a gunshot, is checked by a therapist at the Red Cross rehabilitation center in Kabul, Afghanistan October 14, 2021. After years of combat against Western troops and Afghan forces and Taliban fighters are now getting used to new artificial limbs alongside soldiers of the army they fought to defeat. Picture taken October 14, 2021. REUTERS/Jorge Silva 

A Taliban fighter Mohammad Ishaq walks during a session to get used to his new leg prosthesis at a rehabilitation center in Kabul, Afghanistan October 12, 2021. Ishaq lost a leg after years of combat against Western troops and Afghan forces and is now getting used to new artificial limbs alongside soldiers of the army he fought to defeat. Picture taken October 12, 2021. REUTERS/Jorge Silva TPX IMAGES OF THE DAY 

A Taliban fighter Mohammad Ishaq poses as he pauses during a session to get used to his new leg prosthesis at a rehabilitation center in Kabul, Afghanistan October 12, 2021. Ishaq lost a leg after years of combat against Western troops and Afghan forces and is now getting used to new artificial limbs alongside soldiers of the army he fought to defeat. Sitting in the Red Cross Hospital in Kabul, he speaks simply of the eight years he spent in Helmand, the southern province where some of the bitterest fighting of the war took place and thousands of civilians and combatants were killed and maimed. "For years we fought against the infidels and we defeated them and I was injured," he said, still in the traditional black turban worn by many Taliban fighters. Picture taken October 12, 2021. REUTERS/Jorge Silva 

A Taliban fighter Mohammad Ishaq sits with other patients during a session to get used to his new leg prosthesis at a rehabilitation center in Kabul, Afghanistan October 12, 2021. Ishaq lost a leg after years of combat against Western troops and Afghan forces and is now getting used to new artificial limbs alongside soldiers of the army he fought to defeat. Picture taken October 12, 2021. REUTERS/Jorge Silva 

A Taliban fighter Mohammad Ishaq poses with his old leg prosthesis outside a rehabilitation center in Kabul, Afghanistan October 12, 2021. Ishaq lost a leg after years of combat against Western troops and Afghan forces and is now getting used to new artificial limbs alongside soldiers of the army he fought to defeat. Picture taken October 12, 2021. REUTERS/Jorge Silva 

A former a soldier from the old Afghan Army Khair Mohammad who lost both legs in a mine blast sunbathes at a rehabilitation center in Kabul, Afghanistan October 12, 2021. Taliban fighters are now getting used to new artificial limbs alongside soldiers of the army they fought to defeat. Picture taken October 12, 2021. REUTERS/Jorge Silva 

An artificial limb and a ball are seen during a local volleyball championship organised for Palestinian amputees in Gaza City July 29, 2021. REUTERS/Suhaib Salem 

Malek Salem al-Mejae, who says he lost his leg in the 2011 revolution, takes off his artificial limb to exercise at his own gym with friends in Misrata, Libya January 13, 2021. Picture taken January 13, 2021. REUTERS/Ayman Al-Sahili 

Syrian refugee Ahmad, 54, adjusts his artificial limb at his house in the town of Daraya, southeast of Beirut, Lebanon November 30, 2020. Picture taken November 30, 2020. REUTERS/Issam Abdallah 

A man adjusts an artificial limb for Palestinian Suleiman Malihat, who lost his his right leg, at a Bedouin encampment near Jericho in the Israeli-occupied West Bank July 18, 2020. Picture taken July 18, 2020. REUTERS/Mohamad Torokman 

Palestinians, who, according to medics, lost their legs after they were shot by Israeli forces during border protests, are seen in an artificial limb center in Gaza City April 2, 2019. Picture taken April 2, 2019. REUTERS/Mohammed Salem 

Palestinian woman Nazeeha Qudieh, 38, who, according to medics, lost her right leg after she was shot by Israeli forces during a protest at the Israel-Gaza border, puts on her artificial limb as her brother Suhaib, 33, who also lost a leg in the protests, stands at their house in Khan Younis in the southern Gaza Strip April 1, 2019. Picture taken April 1, 2019. REUTERS/Mohammed Salem 

Palestinian Mohammad Alewa, 19, who, according to medics, lost his right leg after he was shot by Israeli forces during a protest at the Israel-Gaza border, waits to be fitted with an artificial limb in Gaza City April 2, 2019. Picture taken April 2, 2019. REUTERS/Mohammed Salem 

Palestinian woman Nazeeha Qudieh, 38, who, according to medics, lost her right leg after she was shot by Israeli forces during a protest at the Israel-Gaza border, puts on her artificial limb at her house in Khan Younis in the southern Gaza Strip April 1, 2019. Picture taken April 1, 2019. REUTERS/Mohammed Salem 

A technician works in an artificial limb center in Gaza City April 2, 2019. Picture taken April 2, 2019. REUTERS/Mohammed Salem 

Artificial limbs and prosthetic legs are seen in an artificial limb center in Gaza City April 2, 2019. Picture taken April 2, 2019. REUTERS/Mohammed Salem 

Palestinian Abdallah Qassem, 17, who, according to medics, lost his both legs after he was shot by Israeli forces during a protest at the Israel-Gaza border, is seen inside an artificial limb center in Gaza City April 2, 2019. Picture taken April 2, 2019. REUTERS/Mohammed Salem 

Palestinian Basim Abu Obaid, 32, who, according to medics, lost a leg after he was shot by Israeli forces during a protest at the Israel-Gaza border, is reflected in a mirror inside an artificial limb center in Gaza City April 2, 2019. Picture taken April 2, 2019. REUTERS/Mohammed Salem 

Artificial limbs and prosthetic legs are seen in an artificial limb center in Gaza City April 2, 2019. Picture taken April 2, 2019. REUTERS/Mohammed Salem 

Palestinians, who, according to medics, lost their legs after they were shot by Israeli forces during border protests, are seen in an artificial limb center in Gaza City April 2, 2019. Picture taken April 2, 2019. REUTERS/Mohammed Salem 

A patient practices walking with an artificial limb at the Pakistan Institute of Prosthetic and Orthotic Sciences PIPOS in Peshawar, Pakistan January 30, 2019. REUTERS/Fayaz Aziz 

A dummy wears the C-Brace orthosis at the German artificial limb maker Ottobock media day in Vienna, Austria October 23, 2018. Picture taken October 23, 2018. REUTERS/Leonhard Foeger 

A patient wears the C-Brace orthosis at the German artificial limb maker Ottobock media day in Vienna, Austria October 23, 2018. Picture taken October 23, 2018. REUTERS/Leonhard Foeger 

A patient wears the C-Brace orthosis at the German artificial limb maker Ottobock media day in Vienna, Austria October 23, 2018. Picture taken October 23, 2018. REUTERS/Leonhard Foeger 

A patient wears the C-Brace orthosis at the German artificial limb maker Ottobock media day in Vienna, Austria October 23, 2018. Picture taken October 23, 2018. REUTERS/Leonhard Foeger 

A patient wears the C-Brace orthosis at the German artificial limb maker Ottobock media day in Vienna, Austria October 23, 2018. Picture taken October 23, 2018. REUTERS/Leonhard Foeger 

A technician holds the Ottobock C-Brace orthosis during the German artificial limb maker media day in Vienna, Austria October 23, 2018. Picture taken October 23, 2018. REUTERS/Leonhard Foeger 

A pair of artificial limbs for Maya Meri, 8, is seen at a prosthetic center in Istanbul, Turkey, July 5, 2018. Picture taken July 5, 2018. REUTERS/Osman Orsal 

Prosthetics are seen at the Artificial Limb Centre in Basra, Iraq February 28, 2018. Picture taken February 28, 2018. REUTERS/Essam Al-Sudani 

A worker prepares prosthetics at the Artificial Limb Centre in Basra, Iraq February 28, 2018. Picture taken February 28, 2018. REUTERS/Essam Al-Sudani 

A landmine victim waits for his prosthetics at the Artificial Limb Centre in Basra, Iraq February 28, 2018. Picture taken February 28, 2018. REUTERS/Essam Al-Sudani 

A disabled man tries to walk with his prosthetic leg at the Artificial Limb Centre in Basra, Iraq February 28, 2018. Picture taken February 28, 2018. REUTERS/Essam Al-Sudani 

Prosthetics are seen at the Artificial Limb Centre in Basra, Iraq February 28, 2018. Picture taken February 28, 2018. REUTERS/Essam Al-Sudani 

A worker prepares prosthetics at the Artificial Limb Centre in Basra, Iraq February 28, 2018. Picture taken February 28, 2018. REUTERS/Essam Al-Sudani 

Staff assist a man who is waiting for his artificial leg at a prosthetic limbs centre in Marib, Yemen January 26, 2018. Picture taken January 26, 2018. REUTERS/Faisal Al Nasser 

Boys with artificial legs sit in a prosthetic limbs centre in Marib, Yemen January 26, 2018. Picture taken January 26, 2018. REUTERS/Faisal Al Nasser 

People with artificial legs sit in a prosthetic limbs centre in Marib, Yemen January 26, 2018. Picture taken January 26, 2018. REUTERS/Faisal Al Nasser 

A worker prepares an artificial leg at a prosthetic limbs centre which is helping war victims in the southwestern city of Taiz, Yemen December 24, 2017. REUTERS/Anees Mahyoub 

A worker prepares an artificial leg at a prosthetic limbs centre which is helping war victims in the southwestern city of Taiz, Yemen December 24, 2017. REUTERS/Anees Mahyoub 

A worker prepares an artificial leg at a prosthetic limbs centre which is helping war victims in the southwestern city of Taiz, Yemen December 24, 2017. REUTERS/Anees Mahyoub 

A woman with amputated legs waits for her artificial legs at a prosthetic limbs centre which is helping war victims in the southwestern city of Taiz, Yemen December 24, 2017. REUTERS/Anees Mahyoub 

A man with an amputated leg waits for his artificial leg at a prosthetic limbs centre which is helping war victims in the southwestern city of Taiz, Yemen December 24, 2017. REUTERS/Anees Mahyoub 

A woman with amputated legs waits for her artificial legs at a prosthetic limbs centre which is helping war victims in the southwestern city of Taiz, Yemen December 24, 2017. REUTERS/Anees Mahyoub 

A worker measures a man's amputated leg to prepare an artificial leg for him at a prosthetic limbs centre which is helping war victims in the southwestern city of Taiz, Yemen December 24, 2017. REUTERS/Anees Mahyoub 

Khushhal Khan Ayobi, 34, a disabled Afghan National Army (ANA) soldier, fits his artificial limb at his house in Jalalabad province, Afghanistan. August 2, 2017. Picture taken on August 2, 2017.REUTERS/Parwiz 

After losing his right forearm in a factory accident, Chang Hsien-Liang tried several artificial limbs but he was never satisfied. The arms he could afford were too basic and the robotic hand he wanted was too expensive. So, the 46-year-old engineer from southwest Taiwan set out to design and build his own prosthetic arm using 3D printing technology. Now, Chang wants to help others. He is designing and building a prosthetic hand for eight-year-old Angel Peng, whose hand was injured in a scalding accident when she was nine months old. Her mother Peng Ji-han said they heard about Chang at Angel's clinic. "She grew up thinking it is normal not to have one hand," Peng said, adding she could not afford an expensive prosthetic for her daughter. REUTERS/Tyrone Siu SEARCH "PROSTHETIC 3D" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. Matching text: TAIWAN-PROSTHETICS/ 

A technician produces artificial limbs at Red Cross Physical Rehabilitation Centre in Erbil, Iraq April 2, 2017. Picture taken April 2, 2017. REUTERS/Suhaib Salem 

Technicians produce artificial limbs at Red Cross Physical Rehabilitation Centre in Erbil, Iraq April 2, 2017. Picture taken April 2, 2017. REUTERS/Suhaib Salem