Nasal Trauma Assignment Solution

  1. When would a “nasal-cut” and “anti-nasal cut” be required to be ordered for a pair of Spectacles?


Nasal cut spectacles for the nose should not leave some marks on your skin. These nasal pads are designed to assist your brows fit snugly into your face without the use of regular push-ups. Some people prefer the nose cut since it keeps the glasses in place on their face and prevents them from falling off or slipping off your head.

Eyeglasses with anti-nasal cut or comfort parts are prevalent, and both plastic and metal frames usually suggest this. Because plastic frames without nose pads typically feature a bridge section that resembles a horse-shaped stand, this form of nose bridge is simply referred to as a seat bridge. It will also improve the appearance of your face.

If you buy plastic frame glasses without a nose pad, you may develop a plastic allergy and your skin may suffer as a result. So, for a narrow cut-out look, choose the best-looking mirrors that match the contour of your face. Fiberglass frames with no pads are preferable.

  • Briefly outline the steps involve to achieve a nasal cut on a rimless or nylon rim/nyltag frame.


Rimless eyeglasses are a sort of mirror in which the lenses are directly attached to the bridge and/or temples. The form is split into two subtypes: three-piece mirrors and rimways. The three-piece mirrors are constructed of bridge-mounted lenses and two independent temple arms, but the rimways have a supporting arch that joins the temples to the bridge and offers extra lens stability.

1. Measure the nose pads you want to replace. Nose pads are measured in millimetres and the size is determined by the length. Use a tape measure or ruler marked with millimetres to measure the longest part of the pad. If you have teardrop-shaped pads, for example, measure from the top of the teardrop to the bottom, rather than across the pad.

  • Nose pads range in size from 6 to 24 millimetres (0.24 to 0.94 in) in length.

2. Purchase the appropriate size and kind of flexible pads. Sizes and shapes of nose pads vary. The most popular nasal pads are D-shaped or oval, but round, square, and teardrop pads are also available. Examine your current nose and hunt for a matching shape online, at your local pharmacy, or at an eyeglass store.

  • Silicone is regarded as one of the most comfortable nose cushions. Consider attempting this even if you replace the weeping pads with anything else.
  • Nose pad pads are also known as push-in pads or click-style pads.

3. Using a butter knife or a flat head screw, remove the old nose. Rub your spectacles with one hand, pads on the nose up. In the nostril area you wish to delete, press the same hand icon. To remove the nose pad, insert the tip of a screwdriver or butter knife between your icon and nose and rotate your tool gently.

  • Place the new nose pad onto the mount and press it into place. Load the little tab behind the nose pad into the frame’s hole. This might be on the mountain’s arm or directly on the frame of the frames. When the pad is secure, you will feel a snap when you press down gently.
  • If your pads are shaped like a D, ensure sure the flat edge faces away from your face.

3. What are the three factors that can affect the impact resistance of plastic lens?


(a) An examination of the information received in cases of eye injury caused by fractures in common glass lenses suggests that wearing such lenses poses a hazardous risk to the wearer’s eye.

(a) The ophthalmic community agrees that the use of eyeglasses and impact resistant lenses will significantly minimise the frequency of eye injuries.

(c) (1) In order to adequately protect the public from potential eye damage, contact lenses and sunglasses must be fitted with antiseptic lenses, unless the doctor or optician finds that the lenses may not meet the patient’s vision requirements, in which case he or she directs written use on other lenses and notifies the patient in writing.

(2) The physician or optometrist may prescribe glass lenses, plastic lenses, or laminated glass lenses that have been rendered impact resistant in any way; nevertheless, all such lenses must be capable of withstanding the impact test indicated in this section.

(3) Each impact-resistant glass lens utilised for usage must be independently tested for impact and must pass the impact tests stated in this section. Although recommended multifocal lenses are impact resistant, they should not be tried without first evaluating the original design. Prism component multifocal, slab-off prism, lenticular cataract, isiconic, single-dimensional multifocal component, biconcave, myodisc and minus lenticular, bespoke laminate lenses, and cement lenses are impact resistant but do not need to be affected. To demonstrate that all other types of impact-resistant lenses, including non-abrasive white contact lenses, can withstand the impact tests prescribed in this rule, the lens maker will conduct a sample impact test for key lenses on each manufacturing line, and test lenses will be completed. completed with a low lens thickness and less than any other impact resistance treatment All non-medical and medical lenses assessed for statistical significance will be tested in their uncut or finished form.

4. What are the impact testing requirements, conditions and procedures for testing the impact resistance safety of lenses, used for the American ANSI standards.


The ANSI Z87.1 test technique specifies the conditions under which safety eyewear must be worn to protect the eyes and face from impact injury. This standard applies to all sorts of protective equipment, such as eyeglasses, safety goggles, face shields, welding glasses, welding masks, and so on. The ANSI Z87.1 standard was developed to protect eyewear users from potentially harmful elements such as impact, visual acuity, fluid splash, dust, and tiny particles. Mechanical testing instruments are provided by Test Tools to meet the multiple impact tests prescribed in ANSI Z87.1, including Test 5.2.1 Drop Ball Impact Resistance, Test 6.2.2 High Mass Impact Test, Test 9.6 Drop Ball Test, and Test 9.11 High Mass Impact Check.

Requirements, conditions and procedures for Testing:

High Mass Impact Test
A Test Resources Pointed Projectile Test Machine that drops a 500g custom weighted and pointed projectile (17.6 oz). For the recommended 127 cm (50 inch) drop, the test equipment features an adjustable lowering height. This is also handy for adjusting for future testing requirements. The missile is accurately directed within a plastic tube.

Drop Ball Impact Test
This test may be performed in the suggested test area of 127 cm using the same Drop Test equipment (50 inches). The framework suspends a steel ball with a magnetic grip, ASNI Z87.1 1 inch (25.4mm), which is released with the press of a button.

The ANSI Z87.1 standard requires eye protection to have markings that are directly relevant to the device’s capacity to protect against certain threats. Eyeglasses that comply with Z87.1 are designated “Z87.”

Additional symptoms are classified into three types:

• Impact vs. Non-Impact • Splash and dust protection

• Protection against Optical Radiation

Instrumentation for Testing Engineers can also prepare test equipment and other ANSI Z87.1-required tests such as the High Velocity Impact and Entry Test. An ANSI / ISEA approved head form defined in Annexure B of ANSI Z87.1 may also be provided by the Testing Services. We will assist you in finding the best solution for you by utilising our testing experience and modular product design. Call our test engineers now for assistance in determining the optimal test equipment and resources for your level.

5.What is the principle and process involved for chemical toughening a glass lens?

The chemical stabilisation procedure yields glass with no signs of increased heat or eye distortion. Above 400 ° C, the glass is submerged in a bathtub containing potassium salt (often potassium nitrate). Ion exchange occurs between the sodium ion in the glass space and the potassium ion in the bath solution as a result of this. The chemical procedure forms a hard ‘skin’ of glass, making it extremely tough and durable.

In the Trend Marine sector, chemically reinforced glass has been bonded to securely make tempered glass. EN 12337-1 will be used to chemically strengthen the glass, and EN 1288-3 will be used to test the bulk.

Now that we’ve covered the many sorts of interiors for solid glass, let’s look at how it might improve the aesthetic appeal of your office. First, depending on where it will be situated, you have the choice of utilizing robust glass with frames or frames just. Stained glass, for example, may be used on conference walls or board rooms, and non-framed doors can be used for cabinet access.

In addition, following a blast, you may flip a robust glass to add practicality and beauty. If you require seclusion, solid glass may be constructed to withstand the sand-burning or acid-etching processes used to create frosted glass. Alternatively, if privacy is important to you, you might choose a flexible glass – a glass whose privacy you can alter by pushing a button. PDLC technology in solid glass can be used to manufacture replacement glass or smart glass.

Furthermore, reinforced glass may be repainted to bring a splash of color to your office while also separating distinct areas. Back-painted glass is a common choice for room dividers and partitions. Painted glass panels on the reverse can be used to demolish enormous, empty walls and fill in some blank places. As a marker board, you may also use strong glass with a back paint. Depending on your requirements, solid glass or laminated glass can be used (regular, colored, or laminated fabric).

Chemical Strengthening

Chemical stabilisation, also known as ion exchange, treats glass by immersing it in a melted potassium water bath, causing sodium ions in the glass to replace potassium ions in the bathtub. As potassium ions, which are bigger than sodium ions, enter into the potassium solution, they squeeze into the spaces created by little sodium ions. The glass’s surface has been compressed while the context adjusts for the stress.

The chemical composition of the bath can vary significantly, allowing this procedure to be consistent with the material’s eventual application. Chemical reinforcement can produce a highly efficient glass with no appreciable distortion and a shallow layer of solid, alkaline-rich material on the surface. This particular glass’s increased strength makes it perfect not only for severe situations, but also for efficient uses in conductors, semiconductors, power, medicine, and other fields. Chemical hardening may be done in a considerably thinner glass than heat hardening.

Glass Tempering

The heated glass goes through a quick heating and cooling procedure. Because of the severe temperature shift, the glass surface and edges coagulate, resulting in a more substantial exterior with a solid glass composition.

When shattered, strong glass shatters into tiny fragments at the circle’s boundaries, removing the chance of harmful damage. As a result, cooled glass is an excellent choice for a wide range of applications, including:

• Working circumstance

• Protective eyewear (windows, windows, and exposure to projectiles)

• Extreme pressures and temperatures

• Applications with high performance

Chemically reinforced and thermal tempered glass both provide endless solutions for everyday safety and environmental concerns, from aviation and aerospace to laboratory and industrial to interior and fire safety equipment.

Toughened glass has a host of uses –

  • Solid glass is frequently utilised in commercial applications where wind, ice, and heat impact render regular glass ineffective. Furthermore, due of their capacity to withstand huge weights effortlessly, they are employed in high-rise buildings.
  • They are frequently utilised in the windows of high-performance sports cars.
  • When combined with stained glass, stained glass, stained glass, stained glass, etc. Solid glass can be used on a variety of construction components, including escalator side panels, balustrades, handrails, skylight glazing, and so on.
  • For VIP safety, important national and international locations employ bulletproof glass. Glass-free glass is made by combining hard glass with bonded glass.
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