Angled Ophthalmic Needle for Corneal Tube Retention
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Solution Overview
Problem
Conventional ophthalmic instruments find it difficult to retain a tube member at the outer peripheral portion of the cornea during ophthalmic surgery, as they often require making a hole near the center, which can deform the cornea and make the needle visible to the patient, increasing anxiety and risking damage to the iris or crystalline lens.
Innovation Solution
An ophthalmic instrument with a needle portion angled relative to a straight grip portion, allowing for easier manipulation and placement of the tube member at the cornea's outer peripheral portion while avoiding the iris and crystalline lens, ensuring the needle is inclined to prevent deformation and visibility issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hole is made near the center of the cornea, then the tube member can be retained at the eyeball, but the shape of the cornea may be deformed and the needle portion may be seen by the patient causing fear
Solution Approach 1:
The invention inverts the conventional approach by directing the needle portion forward (anteriorly) rather than backward (posteriorly). The needle is oriented at an angle of 45-90 degrees relative to the longitudinal axis of the main body, pointing toward the corneal apex rather than the retina center. This inversion allows the tube to be retained at the outer peripheral portion of the cornea without deforming its shape or causing patient anxiety from needle visibility.
2Object-affected harmful factors
If the tube member is retained at the outer peripheral portion of the cornea, then corneal deformation and needle visibility are avoided, but it is difficult to perform the manipulation with conventional instruments
Solution Approach 1:
The invention introduces a dimensional change by angling the needle portion in a direction crossing the front-rear axis. Instead of the conventional posterior direction, the needle is oriented at an angle of 45-90 degrees relative to the main body's longitudinal axis, creating a new spatial dimension for insertion. This angular orientation enables easy manipulation while retaining the tube at the outer peripheral portion of the cornea.
3Reliability
If the needle portion is directed toward the retina center, then the tube member can be retained at the sclera, but the iris or crystalline lens may be damaged
Solution Approach 1:
The invention inverts the conventional posterior-directed needle orientation to a forward (anterior) direction. By orienting the needle at an angle of 45-90 degrees relative to the main body's longitudinal axis and directing it toward the corneal apex rather than the retina center, the tube can be retained at the outer peripheral portion of the cornea without risking damage to the iris or crystalline lens.
Data Source
AI summary
Provided is an ophthalmic instrument that is for retaining a tube member for providing communication between the inside and the outside of an eyeball, such that the tube member is stuck into an outer membrane of the eyeball and that is suitable for retaining the tube member at an outer peripheral portion of a cornea. An ophthalmic instrument includes a main body and a needle portion connected to the main body. The main body has a straight portion and a bent portion. When attaching a tube member to an eyeball, first, the needle portion is inserted through the tube member, and the tube member is stuck into an outer peripheral portion of a cornea as the outer membrane of the eyeball while a hole is made in the outer peripheral portion of the cornea with the needle portion.