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How to use an ophthalmic surgical microscope and see how it operates.
Release time:
2022-01-18 17:34
Various ophthalmic diseases: meibomian gland inflammation, corneal ulcer, postoperative corneal ulcer conjunctival flap, postoperative corneal edema conjunctival flap, glaucoma prosthesis postoperative, corneal perforation, nutritional cataract, early nutritional cataract, postoperative conjunctival flap. No matter what ophthalmic disease it is, you must first have an ophthalmic surgical microscope.
The ophthalmic surgical microscope requires clear observation of both shallow and deep areas during surgery, with a strong sense of three-dimensionality. When operating within a limited depth range, there is no need to adjust the focal length. Therefore, the surgical microscope should have a certain depth of field requirement. The main lens is at a 45° angle to the microscope body, while the assistant lens is at a 30° angle. When adjusting the microscope's focal length, the eyepiece field of view should be clear.
The illumination of the ophthalmic surgical microscope should be well-focused and uniform, with the illuminated area coinciding with the microscope's field of view. The physical properties of the light source should meet the needs of the surgery, and during longer surgical periods, the light source should not damage the wound. It should have coaxial illumination, as coaxial illumination can eliminate shadows during surgery and utilize fundus reflection to identify other small objects. The brightness of the illumination should be sufficient to clearly distinguish the 11-0 suture line and the condition of the sutured line. Especially in cases requiring high magnification, stronger light is needed. Currently, most use cold light sources and optical fibers to achieve higher brightness.
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The images in the eyepieces of the ophthalmic surgical microscope should be aligned and consistent. This is particularly important for binocular solid microscopes, where the overlap of the images seen by both eyes of the surgeon should be good. Detection method: Use one of the eyepieces from a pair in the microscope and set its diopter adjustment to 0 for monocular observation. Place a piece of white paper marked with a "crosshair" at the object position and adjust it until the "crosshair" is clear. Move the white paper so that the intersection of the "crosshair" is located in the field of view of the eyepiece. At the four intersection points of the "crosshair" and the edges of the field of view, draw four lines. Then observe the other eyepiece to ensure it is in the same position; when both eyes are observed simultaneously, they should completely overlap.
How to use an ophthalmic surgical microscope and see how it operates.
Various ophthalmic diseases: Meibomian gland inflammation, corneal melting, conjunctival flap surgery after corneal melting, conjunctival flap surgery after corneal edema, glaucoma prosthesis surgery, corneal perforation, nutritional cataract, early nutritional cataract, and conjunctival flap surgery. Regardless of the ophthalmic disease, shouldn't you first have an ophthalmic surgical microscope?
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