Between
the years 1500 – 1508 marked beginning of the development of contact lenses.
This all started by the quest for the treatment of optical defects of the
cornea with a device is given to the great Italian, Leonardo da Vinci.
Master Leonardo filled a bowl with water, then placed a man’s face into
it. It is said that for the first time the individual was able to see
clearly. There are two very important factors about this discovery.
Improved refraction and improved peripheral visual
acuity.
the years 1500 – 1508 marked beginning of the development of contact lenses.
This all started by the quest for the treatment of optical defects of the
cornea with a device is given to the great Italian, Leonardo da Vinci.
Master Leonardo filled a bowl with water, then placed a man’s face into
it. It is said that for the first time the individual was able to see
clearly. There are two very important factors about this discovery.
Improved refraction and improved peripheral visual
acuity.
Content
lens was made by Leonardo da Vinci with a funnel on one side so that water
could be poured into it. But due to impracticability, the idea was
immediately discarded.
lens was made by Leonardo da Vinci with a funnel on one side so that water
could be poured into it. But due to impracticability, the idea was
immediately discarded.
A
French scientist, Renee Descartes, in 1636, after reviewing Leonardo’s work, in
a special medical treatise, Ways of Perfecting Vision, described a concept of a
lens placed directly onto the eye. He developed a tube he could fill with
water and place directly against the cornea. This was also discarded on the
grounds that it lacked practicality.
French scientist, Renee Descartes, in 1636, after reviewing Leonardo’s work, in
a special medical treatise, Ways of Perfecting Vision, described a concept of a
lens placed directly onto the eye. He developed a tube he could fill with
water and place directly against the cornea. This was also discarded on the
grounds that it lacked practicality.
It
was not until the 19th century that wearable contact lenses did not
begin to evolve. With the introduction of anesthesia in 1884, contact lens
technology advanced because moulding was made possible.
was not until the 19th century that wearable contact lenses did not
begin to evolve. With the introduction of anesthesia in 1884, contact lens
technology advanced because moulding was made possible.
In
the early 1880’s, glass contact lenses that fit the anterior of the eye, called
scleral lenses, were invented by Adolf Fic, Eugene Cult and August Mueller,
independently. This first lens was made by F. A. Mueller in 1887.
the early 1880’s, glass contact lenses that fit the anterior of the eye, called
scleral lenses, were invented by Adolf Fic, Eugene Cult and August Mueller,
independently. This first lens was made by F. A. Mueller in 1887.
Scleral
glass lenses were primarily manufactured by Carl Zeiss Company in Jiena,
Germany, as early as 1912. Over the course of about sixty years, scleral
lenses made of glass were the major contact lenses used.
glass lenses were primarily manufactured by Carl Zeiss Company in Jiena,
Germany, as early as 1912. Over the course of about sixty years, scleral
lenses made of glass were the major contact lenses used.
In
1937, Theodore Obrig developed manufacturing techniques for making plastic
lenses and suggested the use of fluorescein dyes to study the morphology of the
lens fit against the patient’s cornea. With the introduction of
polymethylmethacrylate (PMMA) a flush fitting sclera. These lenses also had desirable
cosmetic effects. Innovations greatly contributed to the success of
contact lenses, for both cosmetic and therapeutic use.
1937, Theodore Obrig developed manufacturing techniques for making plastic
lenses and suggested the use of fluorescein dyes to study the morphology of the
lens fit against the patient’s cornea. With the introduction of
polymethylmethacrylate (PMMA) a flush fitting sclera. These lenses also had desirable
cosmetic effects. Innovations greatly contributed to the success of
contact lenses, for both cosmetic and therapeutic use.
In
the 1930’s, the availability of plastics produced lenses that were lightweight
and very transparent. They were chemically consistent, stable,
unbreakable, scratch resistant and much easier to manufacture. This
eventually changed the course of contact lens technology.
the 1930’s, the availability of plastics produced lenses that were lightweight
and very transparent. They were chemically consistent, stable,
unbreakable, scratch resistant and much easier to manufacture. This
eventually changed the course of contact lens technology.
An
optician from England, Kevin Touhy, introduced the corneal lens, which covered
only the transparent portion of the protective coating of the eye (the cornea)
in 1947. The lenses, patented by Touhy in 1948, rested directly against
the limbal margin of the cornea. These lenses had diameters of 10.80 to
12.50 mm. They were much more attractive and easier to wear than the
glass and plastic scleral lenses that preceded them.
optician from England, Kevin Touhy, introduced the corneal lens, which covered
only the transparent portion of the protective coating of the eye (the cornea)
in 1947. The lenses, patented by Touhy in 1948, rested directly against
the limbal margin of the cornea. These lenses had diameters of 10.80 to
12.50 mm. They were much more attractive and easier to wear than the
glass and plastic scleral lenses that preceded them.
Many changes were rapidly introduced to these types
of lenses until a product emerged that was safer and could be worn all day, had
tremendous optical clarity and was invisible to the human eye. These
changes allowed early contact lens patients to address the public with
confidence. The new contact lenses could be worn in all kinds of weather
and were useful for sporting activities of all kinds. Because the contact
lens was large, but smaller than earlier scleral lenses, it was not easily
dislodged or lost.
of lenses until a product emerged that was safer and could be worn all day, had
tremendous optical clarity and was invisible to the human eye. These
changes allowed early contact lens patients to address the public with
confidence. The new contact lenses could be worn in all kinds of weather
and were useful for sporting activities of all kinds. Because the contact
lens was large, but smaller than earlier scleral lenses, it was not easily
dislodged or lost.
Eventually
these people, along with students and office workers formed the bulk of the
contact lens consumers and popularized contact lenses. Although there
were thousands and thousands of converts to contact lenses they really did not
threaten to make spectacle lenses a historical footnote. At this point,
the renaissance in the contact lens field was about to explode. The year
was 1960. Celebrities, athletes, business executives, and political figures,
all wanted these new contact lenses.
these people, along with students and office workers formed the bulk of the
contact lens consumers and popularized contact lenses. Although there
were thousands and thousands of converts to contact lenses they really did not
threaten to make spectacle lenses a historical footnote. At this point,
the renaissance in the contact lens field was about to explode. The year
was 1960. Celebrities, athletes, business executives, and political figures,
all wanted these new contact lenses.
The
first corneal lenses to have widespread success were designed in the
1950’s by Frank Dickenson, Wilhelm Sohnjes and John Neil. These lenses
had a thickness of about 0.20 millimeters. Thinner lenses of about 0.10
millimeters were introduced in the early 1960’s Remembering that the contact
lens renaissance began in 1948, the world was just learning about these
new and different contact lens designs. In 1950, George Butterfield
introduced the concept of fitting the peripheral cornea.
first corneal lenses to have widespread success were designed in the
1950’s by Frank Dickenson, Wilhelm Sohnjes and John Neil. These lenses
had a thickness of about 0.20 millimeters. Thinner lenses of about 0.10
millimeters were introduced in the early 1960’s Remembering that the contact
lens renaissance began in 1948, the world was just learning about these
new and different contact lens designs. In 1950, George Butterfield
introduced the concept of fitting the peripheral cornea.
However,
when this plastic was placed in water or any type of aqueous solution this
tough, rigid plastic became very soft, pliable and increased in diameter.
In the wet form it could be bent between the fingers until the edges met, but
would snap back to its original shape. This material was subjected to
rigorous biological testing and found to be inert and fully compatible with
human tissue. It had extreme elasticity when wet, but was still strong
and able to hold its shape. In 1958, Otto Wichterle, who was in charge of
the Macromolecular Institute of the Czechoslovakian National Academy of
Science, along with Dr. Drahoslav Lim, a polymer chemist, developed a new soft
plastic that could be cut down or moulded into a variety of shapes.
when this plastic was placed in water or any type of aqueous solution this
tough, rigid plastic became very soft, pliable and increased in diameter.
In the wet form it could be bent between the fingers until the edges met, but
would snap back to its original shape. This material was subjected to
rigorous biological testing and found to be inert and fully compatible with
human tissue. It had extreme elasticity when wet, but was still strong
and able to hold its shape. In 1958, Otto Wichterle, who was in charge of
the Macromolecular Institute of the Czechoslovakian National Academy of
Science, along with Dr. Drahoslav Lim, a polymer chemist, developed a new soft
plastic that could be cut down or moulded into a variety of shapes.
Original problems with this material were that it
was not oxygen transmissible, it was hydrophilic, and after some time clogged
with impurities from the patient’s lacrimal system. This lens material
also was noted to have extreme reactions to different atmospheric conditions,
such as increased humidity swelled the lens, while less humidity caused the
lens to become contracted on the patient’s cornea. In 1960, the National
Patent Corporation acquired the rights to this new, soft plastic and
sub-licensed it to Bausch and Lomb for manufacturing purposes.
was not oxygen transmissible, it was hydrophilic, and after some time clogged
with impurities from the patient’s lacrimal system. This lens material
also was noted to have extreme reactions to different atmospheric conditions,
such as increased humidity swelled the lens, while less humidity caused the
lens to become contracted on the patient’s cornea. In 1960, the National
Patent Corporation acquired the rights to this new, soft plastic and
sub-licensed it to Bausch and Lomb for manufacturing purposes.
