The Experts below are selected from a list of 54 Experts worldwide ranked by ideXlab platform

Shizuo Mukai - One of the best experts on this subject based on the ideXlab platform.

  • a portable inexpensive nonmydriatic fundus camera based on the raspberry pi computer
    Journal of Ophthalmology, 2017
    Co-Authors: Bailey Y Shen, Shizuo Mukai
    Abstract:

    Purpose. Nonmydriatic fundus cameras allow retinal photography without pharmacologic dilation of the pupil. However, currently available nonmydriatic fundus cameras are bulky, not portable, and expensive. Taking advantage of recent advances in mobile technology, we sought to create a nonmydriatic fundus camera that was affordable and could be carried in a white coat pocket. Methods. We built a point-and-shoot prototype camera using a Raspberry Pi computer, an infrared-sensitive camera board, a dual infrared and white light light-emitting diode, a battery, a 5-inch touchscreen liquid crystal display, and a disposable 20-diopter Condensing Lens. Our prototype camera was based on indirect ophthalmoscopy with both infrared and white lights. Results. The prototype camera measured 133mm × 91mm × 45mm and weighed 386 grams. The total cost of the components, including the disposable Lens, was $185.20. The camera was able to obtain good-quality fundus images without pharmacologic dilation of the pupils. Conclusion. A fully functional, inexpensive, handheld, nonmydriatic fundus camera can be easily assembled from a relatively small number of components. With modest improvements, such a camera could be useful for a variety of healthcare professionals, particularly those who work in settings where a traditional table-mounted nonmydriatic fundus camera would be inconvenient.

  • A Portable, Inexpensive, Nonmydriatic Fundus Camera Based on the Raspberry Pi® Computer
    Hindawi Limited, 2017
    Co-Authors: Bailey Y Shen, Shizuo Mukai
    Abstract:

    Purpose. Nonmydriatic fundus cameras allow retinal photography without pharmacologic dilation of the pupil. However, currently available nonmydriatic fundus cameras are bulky, not portable, and expensive. Taking advantage of recent advances in mobile technology, we sought to create a nonmydriatic fundus camera that was affordable and could be carried in a white coat pocket. Methods. We built a point-and-shoot prototype camera using a Raspberry Pi computer, an infrared-sensitive camera board, a dual infrared and white light light-emitting diode, a battery, a 5-inch touchscreen liquid crystal display, and a disposable 20-diopter Condensing Lens. Our prototype camera was based on indirect ophthalmoscopy with both infrared and white lights. Results. The prototype camera measured 133mm×91mm×45mm and weighed 386 grams. The total cost of the components, including the disposable Lens, was $185.20. The camera was able to obtain good-quality fundus images without pharmacologic dilation of the pupils. Conclusion. A fully functional, inexpensive, handheld, nonmydriatic fundus camera can be easily assembled from a relatively small number of components. With modest improvements, such a camera could be useful for a variety of healthcare professionals, particularly those who work in settings where a traditional table-mounted nonmydriatic fundus camera would be inconvenient

Bailey Y Shen - One of the best experts on this subject based on the ideXlab platform.

  • a portable inexpensive nonmydriatic fundus camera based on the raspberry pi computer
    Journal of Ophthalmology, 2017
    Co-Authors: Bailey Y Shen, Shizuo Mukai
    Abstract:

    Purpose. Nonmydriatic fundus cameras allow retinal photography without pharmacologic dilation of the pupil. However, currently available nonmydriatic fundus cameras are bulky, not portable, and expensive. Taking advantage of recent advances in mobile technology, we sought to create a nonmydriatic fundus camera that was affordable and could be carried in a white coat pocket. Methods. We built a point-and-shoot prototype camera using a Raspberry Pi computer, an infrared-sensitive camera board, a dual infrared and white light light-emitting diode, a battery, a 5-inch touchscreen liquid crystal display, and a disposable 20-diopter Condensing Lens. Our prototype camera was based on indirect ophthalmoscopy with both infrared and white lights. Results. The prototype camera measured 133mm × 91mm × 45mm and weighed 386 grams. The total cost of the components, including the disposable Lens, was $185.20. The camera was able to obtain good-quality fundus images without pharmacologic dilation of the pupils. Conclusion. A fully functional, inexpensive, handheld, nonmydriatic fundus camera can be easily assembled from a relatively small number of components. With modest improvements, such a camera could be useful for a variety of healthcare professionals, particularly those who work in settings where a traditional table-mounted nonmydriatic fundus camera would be inconvenient.

  • A Portable, Inexpensive, Nonmydriatic Fundus Camera Based on the Raspberry Pi® Computer
    Hindawi Limited, 2017
    Co-Authors: Bailey Y Shen, Shizuo Mukai
    Abstract:

    Purpose. Nonmydriatic fundus cameras allow retinal photography without pharmacologic dilation of the pupil. However, currently available nonmydriatic fundus cameras are bulky, not portable, and expensive. Taking advantage of recent advances in mobile technology, we sought to create a nonmydriatic fundus camera that was affordable and could be carried in a white coat pocket. Methods. We built a point-and-shoot prototype camera using a Raspberry Pi computer, an infrared-sensitive camera board, a dual infrared and white light light-emitting diode, a battery, a 5-inch touchscreen liquid crystal display, and a disposable 20-diopter Condensing Lens. Our prototype camera was based on indirect ophthalmoscopy with both infrared and white lights. Results. The prototype camera measured 133mm×91mm×45mm and weighed 386 grams. The total cost of the components, including the disposable Lens, was $185.20. The camera was able to obtain good-quality fundus images without pharmacologic dilation of the pupils. Conclusion. A fully functional, inexpensive, handheld, nonmydriatic fundus camera can be easily assembled from a relatively small number of components. With modest improvements, such a camera could be useful for a variety of healthcare professionals, particularly those who work in settings where a traditional table-mounted nonmydriatic fundus camera would be inconvenient

Harminder S Dua - One of the best experts on this subject based on the ideXlab platform.

  • the 150th anniversary of the binocular indirect ophthalmoscope 1861 2011
    British Journal of Ophthalmology, 2011
    Co-Authors: Richard Keeler, Clive Burrows, Arun D. Singh, Harminder S Dua
    Abstract:

    Eighteen hundred and fifty-one, the year in which Hermann von Helmholtz introduced his ophthalmoscope, can be regarded as the dawn of modern ophthalmology. A decade later, the binocular form of this instrument appeared on the scene. Invented by Marc-Antoine Giraud-Teulon (1816–1887; figure 1) the first model was made by Nachet of Paris and consisted of two solid rhomboid prisms placed in a metal carrier with a perforated concave mirror mounted on the front of the instrument. The instrument was hand-held with the other hand holding a Condensing Lens to form the virtual, reversed image for the indirect method of ophthalmoscopy. Illumination, directed via the concave mirror into the patient's eye, was from an oil lamp positioned above the patient's head. Figure 1 Marc-Antoine Giraud-Teulon (1816–1887) who invented the first version of the binocular ophthalmoscope. The instrument was difficult to use, because of the low level of illumination and in this first model, the fixed inter-pupillary distance setting. The latter problem was solved in Giraud-Teulon's second model in which the right hand prism was divided, the end section moving in and out with a handle on a screw thread thus providing a range of inter-pupillary settings. A sliding mechanism provided prisms behind the eyepieces to aid fusion. In 1862 John Zachariah Laurence, founder of the South London Ophthalmic Hospital, joined up with Charles Heisch to produce a more sophisticated instrument with variable inter-pupillary and vergence adjustments. Despite the endorsement of Professor Hermann Knapp, these binocular ophthalmoscopes did not prove popular. Lack of adequate illumination, difficulty in co-ordinating the angle of illumination, binocularity and maintaining the patient's fixation were too tedious difficulties for most practitioners to surmount. Besides, these were early …

Richard Keeler - One of the best experts on this subject based on the ideXlab platform.

  • the 150th anniversary of the binocular indirect ophthalmoscope 1861 2011
    British Journal of Ophthalmology, 2011
    Co-Authors: Richard Keeler, Clive Burrows, Arun D. Singh, Harminder S Dua
    Abstract:

    Eighteen hundred and fifty-one, the year in which Hermann von Helmholtz introduced his ophthalmoscope, can be regarded as the dawn of modern ophthalmology. A decade later, the binocular form of this instrument appeared on the scene. Invented by Marc-Antoine Giraud-Teulon (1816–1887; figure 1) the first model was made by Nachet of Paris and consisted of two solid rhomboid prisms placed in a metal carrier with a perforated concave mirror mounted on the front of the instrument. The instrument was hand-held with the other hand holding a Condensing Lens to form the virtual, reversed image for the indirect method of ophthalmoscopy. Illumination, directed via the concave mirror into the patient's eye, was from an oil lamp positioned above the patient's head. Figure 1 Marc-Antoine Giraud-Teulon (1816–1887) who invented the first version of the binocular ophthalmoscope. The instrument was difficult to use, because of the low level of illumination and in this first model, the fixed inter-pupillary distance setting. The latter problem was solved in Giraud-Teulon's second model in which the right hand prism was divided, the end section moving in and out with a handle on a screw thread thus providing a range of inter-pupillary settings. A sliding mechanism provided prisms behind the eyepieces to aid fusion. In 1862 John Zachariah Laurence, founder of the South London Ophthalmic Hospital, joined up with Charles Heisch to produce a more sophisticated instrument with variable inter-pupillary and vergence adjustments. Despite the endorsement of Professor Hermann Knapp, these binocular ophthalmoscopes did not prove popular. Lack of adequate illumination, difficulty in co-ordinating the angle of illumination, binocularity and maintaining the patient's fixation were too tedious difficulties for most practitioners to surmount. Besides, these were early …

Arun D. Singh - One of the best experts on this subject based on the ideXlab platform.

  • the 150th anniversary of the binocular indirect ophthalmoscope 1861 2011
    British Journal of Ophthalmology, 2011
    Co-Authors: Richard Keeler, Clive Burrows, Arun D. Singh, Harminder S Dua
    Abstract:

    Eighteen hundred and fifty-one, the year in which Hermann von Helmholtz introduced his ophthalmoscope, can be regarded as the dawn of modern ophthalmology. A decade later, the binocular form of this instrument appeared on the scene. Invented by Marc-Antoine Giraud-Teulon (1816–1887; figure 1) the first model was made by Nachet of Paris and consisted of two solid rhomboid prisms placed in a metal carrier with a perforated concave mirror mounted on the front of the instrument. The instrument was hand-held with the other hand holding a Condensing Lens to form the virtual, reversed image for the indirect method of ophthalmoscopy. Illumination, directed via the concave mirror into the patient's eye, was from an oil lamp positioned above the patient's head. Figure 1 Marc-Antoine Giraud-Teulon (1816–1887) who invented the first version of the binocular ophthalmoscope. The instrument was difficult to use, because of the low level of illumination and in this first model, the fixed inter-pupillary distance setting. The latter problem was solved in Giraud-Teulon's second model in which the right hand prism was divided, the end section moving in and out with a handle on a screw thread thus providing a range of inter-pupillary settings. A sliding mechanism provided prisms behind the eyepieces to aid fusion. In 1862 John Zachariah Laurence, founder of the South London Ophthalmic Hospital, joined up with Charles Heisch to produce a more sophisticated instrument with variable inter-pupillary and vergence adjustments. Despite the endorsement of Professor Hermann Knapp, these binocular ophthalmoscopes did not prove popular. Lack of adequate illumination, difficulty in co-ordinating the angle of illumination, binocularity and maintaining the patient's fixation were too tedious difficulties for most practitioners to surmount. Besides, these were early …