Welcome to your 👁️ Foundations of Vision, Blindness, Pupillary Reflexes, Visual Pathway & Ophthalmic Investigations Arena — 40 Integrated MCQs
1.
A 25-year-old medical student receives an eye drop before examination. The pupil dilates, but accommodation remains largely preserved. Which pharmacological action best explains this effect?
2.
A patient with glaucoma is prescribed a prostaglandin analogue. What is its principal effect on aqueous humour?
3.
A 49-year-old man develops loss of the upper left quadrant of vision in both eyes after a focal cerebral lesion. Which anatomical site is most likely affected?
4.
A patient has a highly congruous left homonymous hemianopia with relative preservation of central vision. The pupils react normally, and the optic discs are unremarkable. Which site best explains the pattern?
5.
A patient with a right-sided posterior visual pathway lesion has a visual-field defect affecting both eyes. Which principle explains why the defect is present in corresponding halves of both visual fields?
6.
A patient with suspected glaucoma requires assessment of functional loss in different areas of vision. Which investigation is most appropriate?
7.
A 63-year-old man undergoes pupillary examination. Both pupils constrict poorly to light but constrict during accommodation for a near target. Which term best describes this examination pattern?
8.
A lesion involving the right optic tract would most likely produce:
9.
A 58-year-old woman has difficulty recognizing objects on the nasal side of her right visual field. Retinal examination is normal. Which retinal fibres normally receive light from the affected part of the visual field?
10.
A 59-year-old woman with gradual central visual distortion undergoes OCT. The scan shows increased macular thickness with multiple hyporeflective intraretinal spaces. What do these findings most strongly indicate?
11.
A 34-year-old woman has one pupil that is larger than the other. The affected pupil reacts poorly to light but constricts slowly during near fixation and redilates slowly afterward. Which pupillary abnormality is most consistent with these findings?
12.
A patient can identify an optotype at 6 metres that a person with standard vision can identify at 60 metres. How should this visual acuity be recorded?
13.
A 65-year-old man has presenting visual acuity of 2/60 in his better eye. According to the WHO distance-vision impairment classification, this is classified as:
14.
A 30-year-old man sustains severe ocular trauma. There is a distorted pupil, shallow anterior chamber and strong suspicion of an open-globe injury. The posterior segment cannot be visualized clearly. Which principle is most appropriate before performing routine ocular ultrasonography?
15.
An ophthalmologist wants a high-resolution cross-sectional image of the macula to assess retinal thickness and intraretinal fluid. Which investigation is most appropriate?
16.
A 42-year-old man is examined because of anisocoria. When light is directed into the right eye, the right pupil does not constrict, but the left pupil constricts normally. When light is directed into the left eye, the left pupil constricts but the right pupil again remains dilated. Which abnormality best explains this pattern?
17.
A patient with bronchial asthma is being considered for topical glaucoma treatment. Which drug group requires particular caution because systemic absorption may cause bronchospasm?
18.
A lesion compressing the central portion of the optic chiasm is most likely to produce which visual-field defect?
19.
A 61-year-old woman develops loss of the lower right quadrant of the visual field in both eyes. MRI shows a lesion involving part of the left optic radiation. Which region is most likely involved?
20.
A student measures reduced visual acuity in a patient. Vision improves significantly when tested through a pinhole. Which factor most likely contributes to the visual impairment?
21.
A patient develops a left superior quadrantanopia after a focal cerebral lesion. Which structure is most likely involved?
22.
A 67-year-old man with glaucoma is prescribed a topical drug that contracts the ciliary muscle and facilitates aqueous drainage through the trabecular pathway. Which drug best fits this mechanism?
23.
A patient with diabetic retinal disease requires assessment of retinal vascular leakage and areas of capillary non-perfusion. Which investigation is most appropriate?
24.
Which structure carries the parasympathetic efferent fibres responsible for pupillary constriction after leaving the midbrain?
25.
A patient has dense vitreous haemorrhage that prevents visualization of the fundus. The ophthalmologist wants to exclude a retinal detachment. Which investigation is most appropriate?
26.
During the swinging-flashlight test, both pupils constrict when light is directed into the left eye but appear to dilate when the light is moved to the right eye. What is the most likely finding?
27.
During examination, light is directed into the right eye and both pupils constrict. What is the constriction of the left pupil called?
28.
A 72-year-old man is being assessed before cataract surgery. The ophthalmologist needs an accurate measurement of the axial length of the globe for ocular biometry. Which investigation is most appropriate?
29.
A patient presents with an undiagnosed painful red eye. Inappropriate unsupervised use of which topical drug could worsen certain corneal infections and increase intraocular pressure?
30.
A patient with glaucoma has progressive thinning of the retinal nerve fibre layer on serial OCT. Which additional test would best determine whether this structural damage has produced corresponding functional loss?
31.
A patient with retinal disease has an area on fluorescein angiography where expected fluorescence cannot be seen because overlying blood prevents transmission of the signal. Which angiographic phenomenon is present?
32.
A patient with markedly raised intraocular pressure receives systemic acetazolamide. Several hours later, laboratory testing shows a tendency toward metabolic acidosis. Which action of the drug explains both its ocular effect and this adverse effect?
33.
A 55-year-old man undergoes automated perimetry because of suspected glaucoma. The test demonstrates a reproducible arcuate area of reduced sensitivity. What is the main clinical value of this finding?
34.
A patient has a small pupil with mild ptosis on the same side. The anisocoria becomes more obvious in darkness. Which pathway is most likely affected?
35.
A patient is asked to shift fixation from a distant wall clock to the examiner's finger held near the face. Which combination forms the normal near response?
36.
A 62-year-old diabetic patient undergoes fundus fluorescein angiography. During the study, an area of retinal fluorescence becomes progressively larger and less well defined in the late images. What does this pattern most likely represent?
37.
Fundus fluorescein angiography in a patient with advanced diabetic retinal disease shows an area where retinal capillaries fail to fill with dye throughout the study. What is the best interpretation?
38.
A 70-year-old woman with anatomically narrow anterior chamber angles requires pharmacological pupil dilatation. Which drug effect creates the greatest concern in this patient?
39.
Which retinal fibres cross to the opposite side at the optic chiasm?
40.
A patient requires short-lasting pupillary dilatation for fundus examination. Which drug is most appropriate?
