Staphyloma, Axial Myopia, Aphakia

Focal thinning of the sclera can produce a staphyloma seen as a localized anatomical bulging of the eye. Posterior staphylomas, as seen in this B-scan, are most commonly associated with highly myopic and elongated globes demonstrated by a bowing out of the posterior scleral wall on ultrasound. They may be seen with an overlying shallow retinal detachment, which may be better appreciated on ultrasound than ophthalmoscopy. The consideration of posterior staphylomas are important when performing intraocular lens calculations. Also notice that the eye is so long that visualization of the pupil and iris is possible even with contact B-scan imaging (imaging of the anterior segment would usually require an immersion B-scan technique).