Eyelid Opening Device with Elastic Sheet for Ophthalmic Surgery
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Solution Overview
Problem
Conventional eyelid opening devices for ophthalmic operations are not universally adaptable due to size variations among individuals, leading to difficulties in fitting and increased contact pressure on the eyeball, which can cause discomfort and impact the surgical field.
Innovation Solution
An eyelid opening device with a flexible, adjustable design comprising a flat upper ring for the face, a lower ring for the conjunctiva sac, and an elastic sheet that expands between them, ensuring the eyelids remain open while minimizing contact pressure and accommodating varying sizes, with features like a hollow lower ring for drainage and a detachable suction tube for fluid management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional eyelid opening device with a fixed-size mold frame is used, then the device structure is simple, but it cannot adapt to individuals with different conjunctiva sac sizes and palpebral fissure widths
Solution Approach 1:
The patent applies the dynamics principle by using an elastic sheet that can expand and contract to adapt to different individual anatomical variations. The elastic sheet transforms from a compact state during insertion to an expanded state when contacting the eyeball, automatically adjusting to the specific size of each patient's conjunctiva sac and palpebral fissure, thereby achieving adaptability without requiring multiple fixed-size devices
Solution Approach 2:
The patent employs parameter changes by utilizing the elastic properties of the sheet material, which changes its physical dimensions (expands) upon contact with the eyeball. This parameter change allows the device to transition from a small insertable form to a larger supportive form, accommodating various individual sizes while maintaining a simple single-size device structure
2Stability of the object's composition
If a thick and wide flared skirt part is inserted in the conjunctiva sac, then stable appliance during operation is provided, but the impact on the eyeball is increased due to increased contact area
Solution Approach 1:
The patent applies flexible shells and thin films by using a thin elastic sheet instead of a thick flared skirt part. The thin film structure provides sufficient flexibility to conform to the eyeball surface while minimizing contact pressure and impact on the eyeball, yet maintains appliance stability through its elastic properties and anchoring mechanism in the conjunctiva sac
Solution Approach 2:
The elastic sheet dynamically adjusts its contact area with the eyeball based on the pressure applied and the anatomical variations of each patient. This dynamic adaptation allows the device to maintain stable appliance while automatically reducing contact pressure on the eyeball, preventing excessive impact while ensuring operational stability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device securely keeps eyelids open, reduces contact pressure on the eyeball, and facilitates a clear surgical field with improved adaptability and safety, allowing for effective infection prevention and efficient fluid management during ophthalmic procedures.
Implementation Method 1
an elastic sheet of a flexible tubular thin film located to extend from a face side to the eyelids conjunctiva side, the elastic sheet attaching one end to the upper ring and attaching the other end to the lower ring by expanding, respectively
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3B
AI summary
An eyelids opening device with a drape comprising a flexible upper ring (1) applied in contact with the face while surrounding eyelids, a lower ring (2) inserted into a conjunctiva sac and applied in contact with the eyelids conjunctiva side, and an elastic sheet (3) of soft tubular thin film located to extend from the face side to the eyelids conjunctiva side and used to fix one end to the upper ring and to fix the other end to the lower ring by expanding, wherein the outside diameter at the smallest portion of the elastic sheet is substantially equal to or longer than the interpalpebral length (between upper and lower eyelids). Difference in size of conjunctiva sac or interpalpebral length of individuals is absorbed even by an appliance of one size, the eyelids can be opened by fitting the eyelids opening device to the eyelids or the face while burden on the eyeball is reduced and high safety is ensured.