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Optometry students carry out an eye test for a patient, outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

Optometry students carry out an eye test for a patient, outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A patient has an eye examined by an optometry student, outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A patient has an eye examined by an optometry student, outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A patient eyes are tested for lenses to be made for a new pair of glasses outside the Phelophepa eye clinic carriage, in Tembisa east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A patient eyes are tested for lenses to be made for a new pair of glasses outside the Phelophepa eye clinic carriage, in Tembisa east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A patient walks around as he tests eye glasses outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A patient walks around as he tests eye glasses outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A patient has an eye examined by an optometry student, outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A patient has an eye examined by an optometry student, outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

Patients queue for an eyes test, outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

Patients queue for an eyes test, outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A healthcare worker stands at the door of the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A healthcare worker stands at the door of the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A patient wearing her new pair of glasses on the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A patient wearing her new pair of glasses on the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A Patient has an eye examined by a volunteer optometrist on the Phelophepa Train in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A Patient has an eye examined by a volunteer optometrist on the Phelophepa Train in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

Patients queue for an eyes test, outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

Patients queue for an eyes test, outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

An optometry student, carries out an eye test on a patient for a new pair of glasses to be made, outside the Phelophepa eye clinic carriage in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

An optometry student, carries out an eye test on a patient for a new pair of glasses to be made, outside the Phelophepa eye clinic carriage in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

The Phelophepa train, is stationed at a station in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

The Phelophepa train, is stationed at a station in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A patient eyes are tested for lenses to be made for a new pair of glasses outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)

A patient eyes are tested for lenses to be made for a new pair of glasses outside the Phelophepa eye clinic carriage, in Tembisa, east of Johannesburg, South Africa, Thursday, Aug. 22, 2024. (AP Photo/Themba Hadebe)