Cataract Laserphaco Probe
Dr. Patricia Bath invented the Laserphaco Probe for cataract surgery, becoming the first African American woman doctor to receive a medical patent and restoring sight to people worldwide.
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What Is the Cataract Laserphaco Probe?
Dr. Patricia Bath invented the Laserphaco Probe for cataract surgery, becoming the first African American woman doctor to receive a medical patent and restoring sight to people worldwide.
Imagine waking up and seeing the world clearly for the first time in decades. That is exactly what happened to patients who received treatment with the Laserphaco Probe — a remarkable medical device invented by Dr. Patricia Bath, an ophthalmologist from Harlem, New York, who believed with her whole heart that eyesight is a basic human right. Cataracts are one of the leading causes of blindness worldwide. They occur when the lens of the eye becomes cloudy, blocking light from reaching the retina. Before Dr. Bath's invention, removing a cataract required a surgeon to use a mechanical drill or other manual instrument — a process that was imprecise, sometimes painful, and not always effective. Dr. Bath invented the Laserphaco Probe in 1981, using laser energy to precisely dissolve and remove the cloudy lens material. The probe combines a laser with a tiny irrigation and aspiration system — it dissolves the cataract, washes the area clean, and removes the debris all in one instrument. She received U.S. Patent #4,744,360 in 1988, becoming the first African American female doctor to receive a medical patent. Her device has been used in more than 30 countries. Most remarkably, it restored sight to patients who had been completely blind for 30 years or more — people who had given up hope of ever seeing again. Dr. Bath's invention stands as one of the most powerful examples of how medicine, engineering, and a belief in human dignity can change lives forever.
Meet the Inventor: Patricia Bath
Dr. Patricia Era Bath was born on November 4, 1942, in Harlem, New York City. The daughter of a subway motorman father and a homemaker mother who saved money to buy Patricia her first chemistry set, she showed extraordinary intellectual gifts from childhood. She was just 16 when she participated in a National Science Foundation summer program in cancer research. Dr. Bath earned her undergraduate degree from Hunter College and her MD from Howard University College of Medicine in 1968. She completed her ophthalmology residency at New York University — becoming the first African American to complete a residency in ophthalmology. She joined the faculty of UCLA and Charles Drew University, where she fought to bring eye care to underserved communities. She founded the American Institute for the Prevention of Blindness, based on her conviction that eyesight is a basic human right and that preventable blindness must be eliminated. She developed the Laserphaco Probe while doing research in Berlin in 1981, patented it in 1988, and spent years refining it. She held five patents in laser eye surgery technology and received numerous awards and honorary degrees. Dr. Bath passed away on May 30, 2019, leaving behind a legacy of sight restored and barriers broken.
How It Works
A cataract makes the eye's natural lens cloudy, like a fogged-up window. Light cannot pass through properly, causing blurry vision and eventually blindness. Dr. Bath's Laserphaco Probe works by using laser energy to dissolve the cloudy lens material. The word 'laserphaco' combines 'laser' with 'phaco,' from the Greek word for lens. The probe is a small, thin instrument inserted through a tiny incision in the eye. Once in position, the laser tip vaporizes and breaks apart the cataract. Simultaneously, a tiny irrigation system washes the area with saline solution, and an aspiration system gently suctions out the dissolved material. Because the laser is so precise, it removes exactly the right tissue without damaging surrounding structures. After the cloudy lens is removed, an artificial lens can be implanted — restoring clear vision. The precision of the laser means smaller incisions, faster healing, and better outcomes than older mechanical methods.
Timeline
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Did You Know?
Sight After 30 Years of Blindness
Dr. Bath's Laserphaco Probe restored vision to patients who had been completely blind for more than 30 years — people who had given up all hope of ever seeing again.
A Historic Patent
When Dr. Bath received U.S. Patent #4,744,360 in 1988, she became the first African American female doctor to receive a medical patent — a milestone in both medical history and civil rights.
Used in 30+ Countries
The Laserphaco Probe has been used to treat cataracts in more than 30 countries around the world, restoring sight to people on every inhabited continent.
Invented in Berlin
Dr. Bath conceived and developed the Laserphaco Probe while doing research in Berlin, Germany — demonstrating that great ideas can be born anywhere in the world.
Eyesight Is a Human Right
Dr. Bath founded the American Institute for the Prevention of Blindness on the principle that eyesight is a basic human right — a belief that drove every aspect of her career and research.
STEM Connection
Dr. Bath's Laserphaco Probe is a brilliant intersection of physics, biology, and engineering. The laser at the heart of her invention operates on principles of optics — the science of light. A laser produces an intense, highly focused beam of light energy. When that energy hits the cloudy lens material, it is absorbed and converted to heat, vaporizing the tissue precisely. Ophthalmology (eye medicine) requires extraordinary precision because the eye is one of the most delicate organs in the human body. Engineers and doctors working in this field must understand anatomy, light physics, fluid dynamics (for the irrigation system), and materials science (for the probe itself). Dr. Bath's work also demonstrates the importance of representation in STEM. As both the first Black person to complete an ophthalmology residency and the first Black female doctor to receive a medical patent, she opened doors and proved that innovation has no boundaries. Her five laser surgery patents show a career of sustained scientific creativity.
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Cataract Laserphaco Probe Complete Teaching Bundle
Lesson Plan
Comprehensive lesson plan covering the invention, the inventor, how it works, and its lasting impact on everyday life.
Student Workbook
Interactive workbook with reading passages, inventor biography, STEM activities, design challenges, and a quiz.
Flashcard Set
40 cards covering vocabulary, key facts, inventor details, how it works, and review challenges.
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