Fortnightly Quiz 2

Which of the following are true about a contact lens with the followingnumbers 8.9/13.8/-4.25

• A the contact lens has a base curve of 8.9 mm
• B the contact lens has a diameter of 8.9 mm
• C the power of the contact lens is 13.8 D
• D the base curve of the contact lens is 13.8 mm

A patient complains of flare at night when driving with his RGPs. His -5.00 lenses are positioned 2.5mm superior temporal in BE. Which of the following combinations will best alleviate his symptoms?

• A flatten BC and increase TD
• B steepen BC and increase OZD
• C flatten BC and decrease OZD
• D steepen BC and decrease TD

Which of the following factors puts an eye at the greatest risk of microbial keratitis while using contact lens ?

• A poor compliance/hygiene
• B swimming with no goggles
• C no hand washing
• D overnight wear CL with insufficient oxygen permeability

The patient has difficulty recognizizing faces and reading .What is this related to ?

• A Central and Paracentral Scotoma
• B Restricted peripheral visual field
• C Increased glare sensitivity
• D Loss of contrast

What is the Visual acuity required for news paper reading

• A 20/50
• B 20/80
• C 20/100
• D 20/200

A Low vision patient has 20/200 visual acuity, He need to see 20/50. What is the telescopic magnification required

• A 2x
• B 4x
• C 6x
• D 10x

Which of the test distance is wrong in low vision management

• A MARS @ 50cm
• B ETDRS @ 2 Meter
• C Pelli Robson @ 1 Meter
• D LogMAR @ 6 Meter

In which eye disorder does too much intraocular pressure damage optic nerve fibers?

• A Blind Spot
• B Optic Neuritis
• C Papilledema
• D Glaucoma

Too much near work, thereby forcing the crystalline lens of the eye to over-accommodate without providing it with sufficient rest, can result in what?

• A Near point stress
• B Presbyopia
• C Primary Cataract
• D Secondary Cataract

Which of the following is generally not true regarding blindness?

• A Most cases of blindness were preventable or are treatable
• B Most cases of blindness are in people who live in developing nations
• C Blindness can be diagnosed with a simple eye test
• D Blind people cannot live full lives

Xerophthalmia indicates deficiency of which vitamin?

• A Vit A
• B Vit B
• C Vit C
• D Vit D

Vision is the main sensory system used by humans to understand the surrounding world. But do we actually perceive what is outside? Which of the following statements is NOT true?

• A The way objects look depends on what we know about them
• B The way objects look depends on what we expect them to look like
• C One eye is all that is needed for 3D perception of the external world
• D People born blind have a large amount of inborn visual data stored in their brains

When reading a book, your lenses need to adjust to focus the light that enters the eye. Which of these statements is true as to how the lenses have adjusted by the ciliary muscles?

• A Lenses are relaxed - they become weaker and rounder
• B Lenses are relaxed - they become stronger and flatter
• C Lenses are squeezed and contracted - they become stronger and flatter
• D Lenses are squeezed and contracted - they become stronger and rounder

Pick the FALSE statement regarding refractive errors

• A Children who are regarded by their teachers as having a learning disability may actually have an undiagnosed refractive error
• B Children with myopia will sometimes have watery and swollen eyes
• C Children with astigmatism have headaches and tired eyes.
• D Children with hyperopia may have to tilt or turn their head to get a clear image

Which statement is wrong in a contact lens (CL) wear result in dry eye?

• A As the water from CL evaporates, it absorbs tears from the tear film dehydrating the cornea.
• B CL damages corneal nerve sensitivity, which decreases lacrimal secretion
• C Long-term CL wear results in hypotrophy of lacrimal gland which decreases lacrimal secretion
• D Continual rubbing of the lens could damage hair-like structures on the corneal layer that stabilizes tear film

A patient walks into Optometry clinic complaining of dry eyes. Upon slit lamp examination, you find patient has fluorescein staining pattern at 3 and 9 oclock positions OU. Which of the following is the BEST management option for this patient?

• A The patient is likely to be a soft contact lens (SCL) wearer and switching to Rigid Gas Permeable (RGP) may be helpful
• B The patient is likely to be a RGP wearer and switching to SCL may be helpful
• C 3 and 9 oclock staining pattern is caused by thimerosol in CL cleaning solution
• D This patient has Vitamin A deficiency and Vitamin A supplements will definitely resolve the issue

Which of the following is NOT a benefit of Ortho-K lenses?

• A Treatment is non-invasive and reversible.
• B Overnight wear has less adaptation and no environmental problems
• C High myopes will improve their uncorrected function and appearance in glasses.
• D Patients can expect to save money from Ortho-K compared to LASIK.

Which of the following sports is NOT ideal for soft contact lenses?

• A football
• B Swimming
• C Jogging
• D Mountain climbing

Which of the following is not a goal of strabismus surgery?

• A To develop or maintain binocular vision.
• B To improve visual acuity in nystagmus
• C To increase the visual field in esotropia.
• D To help improve monocular vision

What is the peak age of strabismus onset?

• A Birth
• B 3 years old
• C 10 years old
• D 50 years old