The realistic eye drawing you see below resulted from three previous lessons:

<a title="How to Draw an Eye Realistically (Part 1 of 4)" href="http://www.letsdrawpeople.com/how-to-draw-an-eye-realistically-part-1-of-4/">1) making a basic line drawing, </a>

<a title="How to Draw an Eye Realistically (Part 2 of 4)" href="http://www.letsdrawpeople.com/how-to-draw-an-eye-realistically-part-2-of-4/">2) adding tones to the drawing,</a>

<a title="How to Draw an Eye Realistically (Part 3 of 4)" href="http://www.letsdrawpeople.com/how-to-draw-an-eye-realistically-part-3-of-4/">3) and then blending those tones together.</a>

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/04/how-to-draw-an-eye-0307-lower-eyelid.jpg"><img class="aligncenter size-full wp-image-1874" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/04/how-to-draw-an-eye-0307-lower-eyelid.jpg" alt="how to draw an eye 0307 lower eyelid" width="800" height="618" /></a>

Now except for perhaps some eyelashes, this drawing looks essentially complete, right? Basically it is, but when it comes to making a realistic drawing, there are different levels of realism. In the fourth and final lesson of this series, we will create a more realistic eye drawing by adding additional layers of detail. You will only need a kneaded eraser, a tortillion, and a 2B graphite pencil. My personal preference for this phase of the drawing is to use a <a title="Pentel GraphGear 500 Automatic Drafting Pencil Black (PG525A)" href="http://www.letsdrawpeople.com/pentel-graphgear-500-automatic-drafting-pencil-black-pg525a/">mechanical pencil</a> with <a title="Pentel Super Hi-Polymer Lead Refill 0.5mm Fine, 2B, 36 Pieces of Lead (C505BP32B-K6)" href="http://www.letsdrawpeople.com/pentel-super-hi-polymer-lead-refill-0-5mm-fine-2b-36-pieces-of-lead-c505bp32b-k6/">graphite lead</a> to ensure I make very fine lines where needed, as you will soon see with the veins, eyelashes, and other fine details.
<h3>Layering the Iris</h3>
Begin with the inner part of the iris and make marks that radiate away from the pupil. Then do the same thing along the outer rim of the iris. Draw using the same method you used in <a title="How to Draw an Eye Realistically (Part 2 of 4)" href="http://www.letsdrawpeople.com/how-to-draw-an-eye-realistically-part-2-of-4/">lesson 2</a> of this series, remaining aware of the tips of those long "oval-like" shapes within the iris. Leave the highlighted ring around the iris alone.

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0401-inner-iris.jpg"><img class="aligncenter size-full wp-image-1912" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0401-inner-iris.jpg" alt="how to draw an eye 0401 inner iris" width="800" height="623" /></a>

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0402-outer-iris.jpg"><img class="aligncenter size-full wp-image-1911" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0402-outer-iris.jpg" alt="how to draw an eye 0402 outer iris" width="800" height="623" /></a>

Next, use your tortillion to blend the graphite. Blend along the direction of the lines and into the highlighted ring. If that center ring around the iris gets a little dull, carefully pull out a few more highlights with your kneaded eraser. Also use your mechanical pencil to lightly draw a few lines that connect the inner iris with the outer iris.

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0403-iris.jpg"><img class="aligncenter size-full wp-image-1910" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0403-iris.jpg" alt="how to draw an eye 0403 iris" width="800" height="621" /></a>
<h3>Layering the White of the Eye</h3>
Since we eventually need to draw eyelashes, it will be a good idea to darken the shadows they will cast on the white of the eye beforehand. Begin by shading in another layer of graphite just below the upper eyelid. Then blend the graphite with your tortillion.

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0404-upper-white-tone.jpg"><img class="aligncenter size-full wp-image-1909" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0404-upper-white-tone.jpg" alt="how to draw an eye 0404 upper white tone" width="800" height="623" /></a>

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0405-upper-white-blend.jpg"><img class="aligncenter size-full wp-image-1908" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0405-upper-white-blend.jpg" alt="how to draw an eye 0405 upper white blend" width="800" height="623" /></a>

Repeat this process along the lower eyelid. Also, darken any shadows in the tear duct area as needed.

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0406-lower-white-blend.jpg"><img class="aligncenter size-full wp-image-1907" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0406-lower-white-blend.jpg" alt="how to draw an eye 0406 lower white blend" width="800" height="621" /></a>

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0407-duct.jpg"><img class="aligncenter size-full wp-image-1906" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0407-duct.jpg" alt="how to draw an eye 0407 duct" width="800" height="623" /></a>

Examine any eye as closely as the one we are drawing here, and you are bound to see some veins. Very lightly with your mechanical pencil, draw some wiggly lines that jet away from the eyelids and toward the iris. Use lines of varying length and cross a few of them for a more natural appearance.

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0408-veins-tone.jpg"><img class="aligncenter size-full wp-image-1905" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0408-veins-tone.jpg" alt="how to draw an eye 0408 veins tone" width="800" height="618" /></a>

Next, carefully blend the veins with a tortillion for a more subtle appearance. If any veins look too dark or unnatural, lift some of the graphite with the kneaded eraser.

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0409-veins-blend.jpg"><img class="aligncenter size-full wp-image-1904" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0409-veins-blend.jpg" alt="how to draw an eye 0409 veins blend" width="800" height="622" /></a>
<h3>Layering the Skin</h3>
You can create texture on the skin by repeating the <a title="How to Draw an Eye Realistically (Part 2 of 4)" href="http://www.letsdrawpeople.com/how-to-draw-an-eye-realistically-part-2-of-4/">tone</a> and <a title="How to Draw an Eye Realistically (Part 3 of 4)" href="http://www.letsdrawpeople.com/how-to-draw-an-eye-realistically-part-3-of-4/">blend</a> process used in earlier lessons. In the following two images, you can see a small section, just above the inner corner and upper eyelid, layered with darker pencil marks and then blended smoothly.

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0410-around-upper-lid-tone.jpg"><img class="aligncenter size-full wp-image-1903" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0410-around-upper-lid-tone.jpg" alt="how to draw an eye 0410 around upper lid tone" width="800" height="620" /></a>

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0411-around-upper-lid-blend.jpg"><img class="aligncenter size-full wp-image-1902" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0411-around-upper-lid-blend.jpg" alt="how to draw an eye 0411 around upper lid blend" width="800" height="623" /></a>

Repeat this layering process for the rest of the skin. Make sure to focus on areas that need to be darker, such as the shadow caused by the flap of skin just above the upper eyelid. Use light and dark tones to indicate where surfaces on different planes meet at an edge, as you can see along the rim of the eyelids. Also remember to lift areas that need to be lightened with your kneaded eraser.

<a href="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0412-around-upper-lid.jpg"><img class="aligncenter size-full wp-image-1901" src="http://www.letsdrawpeople.com/wp-content/uploads/2015/06/how-to-draw-an-eye-0412-around-upper-lid.jpg" alt="how to draw an eye 0412 around upper lid" width="800" height="621" /></a>
<h3>Layering the Eyelashes</h3>
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closing

with any of the steps from this lesson, you can add more layers than indicated and get more realistic effect

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