Index: wp-content/themes/twentyfourteen/image.php
===================================================================
--- wp-content/themes/twentyfourteen/image.php	(revision 26595)
+++ wp-content/themes/twentyfourteen/image.php	(working copy)
@@ -39,6 +39,12 @@
 					<div class="entry-attachment">
 						<div class="attachment">
 							<?php twentyfourteen_the_attached_image(); ?>
+							<ul class="slider-direction-nav">
+								<li><?php previous_image_link( false, __( 'Previous', 'twentyfourteen' ) ); ?></li>
+								<li><?php next_image_link( false, __( 'Next', 'twentyfourteen' ) ); ?></li>
+							</ul>
 						</div><!-- .attachment -->
 
 						<?php if ( has_excerpt() ) : ?>
Index: wp-content/themes/twentyfourteen/style.css
===================================================================
--- wp-content/themes/twentyfourteen/style.css	(revision 26595)
+++ wp-content/themes/twentyfourteen/style.css	(working copy)
@@ -2862,6 +2862,7 @@
 	display: block;
 	font-size: 0;
 	height: 46px;
+	text-decoration: none;
 }
 
 .slider-direction-nav a:hover {
@@ -2875,7 +2876,7 @@
 	line-height: 46px;
 }
 
-.slider-direction-nav .slider-next:before {
+.slider-direction-nav li:last-child a:before {
 	content: "\f429";
 }